As long as your healers are healing and your tank is tanking, the ogre will go down easy as pie. Really, you only need 4 or 5 people to beat the whole thing, since batraal is a push over now. It's tank and spank while avoiding the ghosts, they go up, mages go down and vice versa. Small heals in the first phase, bigger heals when the ogre goes red. Keep stoneskin up, rotate SS if you have more than one whm as in any other fight.