For the first raid to karazhan, we will go with:
MT, OT, 3 healers, dps class that can heal (shadow priest, dps shaman, feral/balance druid), 1 rogue, 1 hunter, 1 mage and 1 warlock.
Lvl 70 is required. And you need to be attuned. Read my other post to see what you need to do to attune.