My guild is working on Thok hc. The first stack up phase goes fine most of the times but when we do the next stack up phase it becomes very tricky because we´re (almost) out of cd's and the dmg of the dots and bats becomes really high.
We usually let a rogue trick the bats to the tank (1 tank only) and then try to dps them down. Thing is the melee has to watch out for the breath. Seems those bats die pretty slowly.
We have 3 healers and 1 tank (prot pala). Generally a very melee heavy comp:
Prot pala
Resto sham
Disc priest
MW monk
Fury war
Feral druid
WW monk
Assasin rogue
Retri pala
Destro/affli lock