Depends on fights, but on Teron for example is it often:
1. hunter 2k dps
2-4. rogue 1,8-1,9k and then casters from 1,3k-1,5k~
But most common is 2 rogues in top, dps warr 3, me (sp) or warlock 4-5, hunter/melee shaman 6-8, mages/affli locks/rest 8-12