Feral DPS is the top SINGLE target DPS in the game right now as far as I can tell. But many of the fights in ToC have a lot of Aoe components which drags their comparative dps down. I am pulling anywhere between 6.3k and 7.5k on non gimmick fights.
As for the two druids in question.
IF ArP trinket (Mjolner or Grim Toll) is available gem Fractured Cardinals (20 ArP) in all red slots and Deft Ametrine in all yellows(10 agil 10 haste). the only blue gem in any good Feral DPS's gear should be the prismatic nightmare tear (10 to all stats). Enchants should be agility if available on that particular item or AP if no agility is available.
If no ArP trinket is available gem and enchant the same way except use Delicate Cardinals instead of Fractured.
Weapon Enchant should be Berserking for all feral DPS and I will stand by that until someone can show/link me the benefits of Executioner over Berserking.