This is the best in slot list for Feral Druids, according to SimCraft simulations. I currently have everything except for the DMF trinket and I clock in 10-20k dps on every pull. I'm using Deathbringer's Wil to substitute the DMF trinket.
Head: Headpiece of the Shattered ValeNeck: Necklace of the DeepShoulder: Spaulders of the Shattered ValeBack: Fen-Yu, Fury of XuenChest: Bloodsea Brigand's VestWrist: Armbands of Dark DeterminationHands: Gloves of the Endless DarkWaist: Soul-Devouring CinchLegs: Leggings of the Immortal NightFeet: Footpads of Impending DeathFinger: Spellbound Runic Band of Unrelenting SlaughterFinger: Ashen Band of Endless VengeanceTrinket: Darkmoon Card: GreatnessTrinket: Ghost Iron DragonlingTwo-Hand: Gao-Rei, Staff of the Legendary Protector
As set on WowHead with enchants and gems