Not That Simple

Strength
1 Str = 2.37864 AP (2.616504 AP) (Cat)
1 Str = 2.1624 AP (2.37864 AP) (Bear)
1 Str = 2.292144 AP (2.5213584 AP) (Bear with PotP)

Agility
1 Agi = 1.18932 AP (1.308252 AP) (Cat only)
1 Agi = 0.0129744% (0.01427184%) Crit
1 Agi = 0.0225641% (0.0248206%) Dodge
1 Agi = 2.1624 (2.37864) Armor

77.075 (70.068) Agi = 1% Crit
44.318 (40.289)Agi = 1% Dodge

Stamina
1 Sta = 10.812 (11.8932) Health (Cat)
1 Sta = 14.8665 (16.35315) Health (Bear)

Intellect
1 Int = 19.4616 (21.40776) Mana
1 Int = 0.00778464% (0.0085631%) SpellCrit

125.458 (116.780) Int = 1% SpellCrit

Intellect also increases the amount of health & mana regen you get from Spirit - not very important for ferals

Spirit
Spirit increases your out of combat health regen and your out of 5sec rule mana regen - not very important for ferals

Crit Rating
1 CritRating = 0.022% Crit
45.91 CritRating = 1% Crit

Dodge Rating
1 DodgeRating = 0.0220982% Dodge
45.2525 DodgeRating = 1% Dodge

Haste Rating
1 HasteRating = 0.03965% Haste
25.223 HasteRating = 1% Haste

Hit Rating
1 HitRating = 0.030% Hit
32.79 HitRating = 1% Hit

Cap vs Level 80 mob = 5% Hit = 163.95 HitRating
Cap vs Level 81 mob = 5.5% Hit = 180.34 HitRating
Cap vs Level 82 mob = 6% Hit = 196.74 HitRating
Cap vs Level 83 mob = 8% Hit = 262.32 HitRating (Raid Bosses)

Expertise Rating
1 ExpertiseRating = 0.0305% reduction in dodge & parry chance
32.79 ExpertiseRating = 1% reduction in dodge & parry chance

Cap vs Level 80 mob = 5%(Dodge) / ?%(Parry) = 163.95 / ? ExpertiseRating
Cap vs Level 81 mob = 5.5%(Dodge) / ?%(Parry) = 180.345 / ? ExpertiseRating
Cap vs Level 82 mob = 6%(Dodge) / ?%(Parry) = 196.74 / ? ExpertiseRating
Cap vs Level 83 mob = 6.5%(Dodge) / 15%(Parry) = 213.135 / 491.85 ExpertiseRating (Raid Bosses)

The 10 Expertise we get from Primal Precision is equivalent to 81.975 ExpertiseRating so subtract that from the above figures if you have that talent.

Defense Rating
1 DefenseRating = 0.008% dodge and 0.008% chance to be missed and 0.008% reduced chance to be crit (Crit reduction not needed for PvE if you have SotF )
122.96 Defense Rating = 1% chance to dodge and 1% chance to be missed and 1% reduced chance to be crit (Crit reduction not needed for PvE if you have SotF )

1 DefRating = 0.64 DodgeRating (counting misses as dodges)

ArmorPenetration Rating
1 ArPenRating = 0.07145% ArmorPenetration
13.9957272 ArPenRating = 1% Armor Penetration

ArPen cap (100%) = 1400 ArPen

Resilience
94.27125 Resilience = -1% chance to be crit, -2.2% crit damage, -1% all damage & -2.2% mana drain reduction

1414.06872 Resilience = 33% reduction from crit damage = the cap for this part of resilience's effect

Regualar (white) Armor
Includes non-bonus armor from all slots except rings, trinkets, neck & weapon. All armor from rings, trinkets, neck & weapon as well as armor patchs & any bonus (green) armor on items & armor from Agi receive no bonus from SotF, Thick Hide or the metagem

1 Armor = 6.251 Armor (Bear)
1 Armor = 6.8761 Armor (Bear with Thick Hide)
1 Armor = 7.013622 Armor (Bear with Thick Hide & Armor Metagem)

Damage Reduction from Armor % = Armor * 100 / (Armor + (467.5 * AttackerLevel - 22167.5))

DR% for Lvl83 Boss mobs = Armor * 100 / (Armor + 16635)

Armor cap (75% DR) for Lvl83 Boss mobs = 49905 Armor

Maximum Single-Target DPS Spec: Link

This spec takes every talent, that increases single target DPS. You've got one point left, possibilities could be: 4/5 Furor, 1/2 iLotP or 1/3 Feral Instinct

Maximum AoE-DPS Spec: Link

This spec only has 5 different points. You've got 3/3 Feral Instinct here and 2/2 iLotP. You could aswell take the two points out of iLotP and together with the last left point skill 3/5 Feral Aggression.

Actually Feral Swiftness and Survival Instincts don't directly increase your damage. But they offer very significant survival tools. Additionaly, both allow you to DPS for a second longer here and there.

Rotation
As there is no real rotation, we speak of a "priority list" for cat DPS. Try to follow the following instructions in the given order.

1. Keep up Savage Roar
2. Keep up Mangle
3. Keep up Rake
4. Use shred for CP regeneration (remember, that points 2 and 3 are more important)
5. When at 5 CP and Rip is not up, use Rip
6. When below 30 Energy, use TF
7. Use Clearcast Proccs for Shred
8. When at 5 CP and Rip and SR are running with 8 seconds (might be longer, depending on your gear) or longer each, use FB
9. When Rip and SR will drop at nearly the same time (with less than 3 seconds difference), try to recognize it early. Then use SR with a small amount of CP to desynchronize both timers.
10. Use Berserk only at high energy, (but not higher than 85) not directly after TF and as often as possible. If you will get Hysteria or some boss mechanics will enhance your damage, save it for these situations

This priority list is quite hard to maintain. Cat DPS is one of the most complicated ones in PvE WoW. Try to remember these rules:

1. Remember: Savage Roar buffs everything; Mangle buffs bleeds and shred; Bleeds buff shred. That means, never shred without applying mangle and at least one bleeding.
2. It doesn't matter how many CP you use for SR. Just make sure it never drops!
3. Use Rip and FB only with 5 CP
4. It is very tricky to squeeze in FB's in your rotation. At first you should try to maximize SR, Mangle, Rip and Rake uptime (in this order). When you get more experienced, try to FB more. You need to guess how much time is needed for building up 5 CP's - this depends on your crit chance. Usually, a FB is worth dropping Rip for 4 Ticks approx (8 seconds). Remember that after using Rip, you need energy for building at least one more CP to refresh SR if necessary.
5. FB is most efficient when used at 35 energy. It gets worse when you spend more, thus making it least efficient when using with 65 energy.
6. A 5 CP FB is always more efficient than a shred, even when used at 65 energy.
7. When using the shred glyph: When rake and rip are about to expire and you could shred to extend the rip duration for 2 more seconds at the

The Value of Hit / Expertise

A question very often asked is, whether you need to be hit or expertise capped. The answer is: It depends on your DPS. Hit and expertise scale directly with your DPS. The better your gear gets, the higher the value of Hit/Expertise gets. When in blue gear, both contribute very little to your DPS. With Ulduar BiS, they are quite important, but still not the best stats. The same holds true for T9, although both are more important when you have really good T9 lvl Gear. When you have a lot of iLvl 264 Gear or higher from ICC, they turn out to be extremely good. Try to reach the caps then. Only ArP will be better (and only if you're near the hard cap). Also, there is no such 'magic threshold'. Both stats always have the same value (as long as below the hard cap), no matter if you have 0% hit, 3% hit or 5% hit. That means the two stats scale linear.
BUT - for a beginner it could be quite confusing missing a lot. Our DPS priority is already hard enough even without our attacks being dodged. It could mess up the DPS of a beginner, if his hit and/or expertise is too low. If you consider yourself weak at maintain a stable cycle, then more hit/expertise could help to stabilize it. At the end of the day try to always be hit and expertise capped. Misses and dodges cause your dps to drop. it's always best to avoid those.

Topic: Armor penetration rating

Armor is a stat with diminishing returns. Meaning: the more Armor you have, the worse it gets in terms of damage reduction percentage. The first 1000 armor are far more valuable, than the last 1000 armor. That is the reason, that ArPen scales better than linear. When you have only a little bit ArPen, you reduce your target's armor only a little bit - but we know that the last 1000 armor are not that important. But if you manage to gather more ArPen, you will reduce your target's armor more and more, which gets more and more valuable.
Short story: ArPen scales better than linear - the more you have, the better each point of it becomes.

At about 400 - 500 ArPen, ArPen becomes the best stat
The exact amount depends on your gear (especially the trinkets). Use RAWR or Toskk to find out, when exactly ArP overtakes Agility. Also remember, that the value of both is very similar at that low lvl of ArP. The difference is extremely small and only gets bigger, when you gather more ArP.
As soon as you can reach these numbers, regemming all Agility gems for ArP gems would improve your DPS.
Our goal is to come as close to the ArP Hard Cap as possible.

And now it's time for mentioning the three ArP trinkets currently ingame:

[Grim Toll]
[Mjolnir Runestone]
[Needle-Encrusted Scorpion]

Wearing two of these trinkets is quite useless since they have a significant shared uptime and then there would be ArP wasted (assuming you've got some ArP on your gear). The goal is, to reach the ArP soft-cap. Soft Cap means: you have exactly 100% Armor Ignore when your trinket proccs.
ArP Soft-Cap: 722 ArPen, if wearing [Needle-Encrusted Scorpion]
ArP Soft-Cap: 735 ArPen, if wearing [Mjolnir Runestone]
ArP Soft-Cap: 788 ArPen, if wearing [Grim Toll]
If you are wearing a lot of ICC items and manage to get about 1000 Passive ArP, it's better not to wear one of the 3 ArP Trinkets and instead going for the Passive HardCap!

use RAWR or Toskk. Although neither of both are 100% accurate, it's probably the best way to determine gear upgrades for you.

Which idol should I wear?
The best Cat Idol for single-Target DPS is [Idol of the Crying Moon]. But it takes 15 seconds after applying rake to reach its full effect. This is bad for encounters with DPS interruptions, like Anub'Arak or Lady Deathwisper. Additionally you normally don't use rake on AoE situations.
The next best Cat Idol is [Idol of Mutilation]. This is only 20 Agi worse and there are many situations where it's the better idol (like AoE or Trash).
After that, it depends.
If you have to mangle yourself, [Idol of the Corruptor] is BiS for you. If not, then it depends on your ArP. If you are below approx 250 ArP, [Idol of Worship] would be your choice, above that the [Idol of the Ravenous Beast] becomes better. But actually the Rip and Shred idol both grant very similar DPS - the difference is really low.

Which trinkets should I wear?
The [Darkmoon Card: Greatness] is in most gear setups one of the best trinkets. This will not be a useless investment, as it is an extremely good tanking trinket aswell. Although it's quite old and has only iLvl200 it's still really good and easily obtainable.
Some upgrades to the Card are [[Herkuml War Token]], [[Death's Choice]] , [[Whispering Fanged Skull]]
The 2nd best Cat Trinket is [[Deathbringer's Will]] and of course the best one is The Heroic Deathbringers's Will.

In the second slot you should wear one of the three ArP trinkets mentioned above ([[Grim Toll]], [[Mjolnir Runestone]] or [[Needle-Encrusted Scorpion]]).
If you can reach high ArP numbers (About 1000 or above), try to swap your ArP trinket for one of the above mentioned (even the darkmoon card).
How good are our set bonuses?
The 2T9 bonus is very good.
The 4T9 bonus is mediocre.
The 2T10 bonus is good.
The 4T10 bonus is extremely good.
2T8 + 2T9 will be an upgrade to 4T8. And although the 4T9 bonus is worse than the 4T8 one, the higher item level of two more T9 items outweighs this.
But because the 4T9 itself isn't that good, it's probably better to wear 2T9 and some offsetpieces instead of 4T9.
The T10 bonuses are both really good, especially the 4pc. Combined with the high iLvl it means you really should wear 4T10.
BiS set without ICC Hardmodes

Slot Item
Head [[Sanctified Lasherweave Headguard]]

Neck [[Sindragosa's Cruel Claw]]

Shoulders [[Sanctified Lasherweave Shoulderpads]]

Back [[Sylvanas' Cunning]] or [[Vereesa's Dexterity]]

Chest [[Sanctified Lasherweave Raiment]]

Wrist [[Toskk's Maximized Wristguards]]

Hands [[Aldriana's Gloves of Secrecy]]

Waist [[Vengeful Noose]]

Legs [[Sanctified Lasherweave Legguards]]

Feet [[Icewalker Treads]]

Ring 1 [[Ashen Band of Endless Vengeance]]

Ring 2 [[Frostbrood Sapphire Ring]]

Trinket 1 [[Death's Choice]]

Trinket 2 [[Deathbringer's Will]]

Weapon [[Oathbinder, Charge of the Ranger-General]]

Relic [[Idol of the Crying Moon]]


ArP Food Hearty Rhino. Gems used: 13x [[Fractured Cardinal Ruby]], 4x [[Accurate Ametrine]], 2x [[Glinting Ametrine]], 1x [[Nightmare Tear]].

227 / 263 Hit Rating
132 / 132 Expertise Rating
1284 / 1400 ArP
180 Haste Rating


Feel free to use more [[Fractured Cardinal Ruby]] instead of the orange gems to come closer to the ArP Hardcap. On such a high ArP level, ArP is worth more than any other stat. The downside is, that your rotation will get more complicated because you will miss more often.
Theoretically, it should be a DPS increase to use 5 more ArP gems to reach 1384 / 1400 ArP.

Professions


Alchemy: +80 Attack power through mixology, when using Flask of endless rage
Blacksmithing: 2 more sockets. Assuming epic ArPen gems, the bonus is 40 ArP.
Enchanting: 2x +40 AP ring enchant. Bonus: +80 Attack Power
Engineering: On use 340 Haste Rating for 12 seconds, 1 min CD. Averages out to 68 Haste Rating. Otherwise you would enchant +20 Agi. On the Cloak you get 1 additional Agi. Total Bonus: +68 Haste Rating, -19 Agi
Herbalism: 3600 self-heal for 5 seconds, 3 min CD
Inscription: +80 Attack power because of the enhanced shoulder enchant
Jewelcrafting: 3x +34 ArPen gems instead of +20 ArPen. 3*14 = 42 ArP.
Leatherworking: + 80 Attack power because of the enhanced wrist enchant
Mining: + 60 Stamina
Skinning: +40 Crit Rating
Tailoring: Swordguard Embroidery grants 400 AP for 15 seconds, roughly once a minute. This averages out to approx 100 AP. You miss out the +22 Agi for this. Total Bonus: +100 AP, -22 Agi.

Glyphs
Major Glyphs:
1. [[Glyph of Savage Roar]]
2. [[Glyph of Rip]]
3. [[Glyph of Shred]]
Alternatives
4. [[Glyph of Mangle]]
5. [[Glyph of Berserk]]
Minor Glyphs:
1. [[Glyph of Dash]]
2. [[Glyph of Unburdened Rebirth]]
3. [[Glyph of Challenging Roar]]


Enchants

Head - [[Arcanum of Torment]]
Shoulder - [Master's Inscription of the Axe] > [[Greater Inscription of the Axe]]
Back - [Swordguard Embroidery] > +23 Agi (Engineering) > +22 Agi
Chest - +10 Stats
Wrist - [Fur Lining - Attack Power] > Greater Assault
Hands - [Hyperspeed Accelerators] > +20 Agi
Legs - [[Icescale Leg Armor]] or Nerubian Leg Reinforcements
Feet - Icewalker (when below Hit Cap) > 16 Agi
Finger - +40 AP
Weapon - Berserking > Mongoose > Massacre > Executioner
Gems
There is only one Meta, you always want to have this one activated: [[Relentless Earthsiege Diamond]]
The [[Chaotic Skyflare Diamond]] is coming close, but it require 2 Blue gems and this requirement is worse than one yellow + one blue.

Red socket: [[Fractured Cardinal Ruby]]. If you have less than 400 ArP or just a little more than your soft-cap of ArPen, use [[Delicate Cardinal Ruby]].
Blue socket: Put [[Nightmare Tear]] in the blue socket with the best available bonus. Put [[Fractured Cardinal Ruby]] in every other blue socket (or [[Delicate Cardinal Ruby]] if Agi is better than ArP for you).
Yellow socket: If the socket bonus is weak (less than 4 Agi), put [[Fractured Cardinal Ruby]] or [[Delicate Cardinal Ruby]] inside. If the bonus is good, choose one from [Accurate Ametrine], [[Glinting Ametrine]] or [[Deft Ametrine]]. Even though the socket bonus is good, [[Fractured Cardinal Ruby]] is better when at very high ArP level (above 1000)

The Red gems are far superior than the blue ones and better than the yellow ones aswell. Therefore the best you can do is:
Fill every socket with red gems except of one. There you put [[Nightmare Tear]]. Of course you choose an item with a good Socket bonus, you would otherwise miss if you use the normal red gem instead.
Only if some yellow sockets got good bonuses (4 Agi or more), you can choose to gem one of the mentioned orange gems.
Buffs
You should use a [[Flask of Endless Rage]] and [[Hearty Rhino]]. If you are below than 400 ArPen or above your soft-cap for ArPen, then [[Blackened Dragonfin]] would be your choice.

It's again hard to tell you, how important each buff is as this depends on your gear. But the order should be roughly the same.

+20% Physical Haste -> Enhancement Shaman (imp. Windfury Totem) or Frost-DK (imp. Icy Talons)
+10% AP -> Blood-DK (Abomination's Might), MM-Hunter (Trueshot Aura) or Enhancement Shaman (Unleashed Rage)
+Agi / Str -> DK (Horn of winter provides 155 each) or Enhancement Shaman (imp. Strength of Earth Totem provides 178 each!)
-20% target armor -> Debuff applied by Prot-Warrior (Sunder armor) or every rogue (Expose Armor, Finishing move)
+AP -> Warriors (+548 AP when not skilled, +685 when skilled in Commanding Presence) or Paladins (+550 AP when not skilled, +687 when skilled in imp. Blessing of Might)
+4% physical damage -> Debuff applied by Combat Rogues (Savage Combat) or Arms Warrior (Blood Frenzy)
+10% Stats -> Paladins (Blessing of Kings)
+3% Dmg -> BM Hunter (Ferocious Inspiration, their pet buffs this) or Retribution Paladin (Sanctified Retribution)
Traumabot -> Another Feraldruid or Arms warrior applying Mangle/Trauma for you so you can skip it from your DPS Cycle
+3% Crit -> Debuff applied Elemental Shaman (Totem of Wrath affects all targets within 40 yards of the totem), Retribution Paladin (Heart of the Crusader, the Paladin has to judge a single target) or Assassination Rogues (Master Poisoner affects all target that the rogue has poisoned; he can spread this with Fan of Knives)
+ Stats -> Every Druid (Yes, this includes yourself!) through imp. Mark of the Wild
-5% target armor -> Feral and Moonkin Druids (Fearie Fire and Feral Fearie Fire, you can apply this yourself without losing DPS), Hunter (if they have a wrasp as pet) and warlocks (Curse of Weakness would mean a DPS loss for them)
+3% Haste -> Balance Druid (imp. Moonkin Form) or Retribution (Swift Retribution)

Movie Guide
This movie guide, created by Coldbear, is a good summary of most aspects for cats. It's quite fast and a little hard to follow, but otherwise has a high quality
Link

Nice job, but why from you?

We dont have any other Feral Cats. so thund suggested putting one up for refference