You absolutely need either ZOMGDPSBBQ or you need an off-tank type to survive the sleeps. He will usually sleep the closest person to him in melee range. What I did was have my offtank stand inside him or had the pets go melee him. You might go send your shammy over to stand in him while your pally builds threat. You might also try dropping a taunt totem after the pally gets a nice threat lead and see if it'll help any. This is gonna be a bitch for me as my new group is pally+mages. :P