OP you are right , problem is most people never heard of off tanking . there are many strategies to overcome the killing of a group of mobs . tank them all and hit the floor\stress the healers , control the max of them and then kill 1 by 1 , main tank get some and hold them off tank peals some and group burns the off tank mobs down first . you dont need to have all the mobs of you to be a " good tank " , you just need to find the right strategic to the given problem taking in consideration the group ( the tools ) you have . specially in this game where the same class can preform diferent roles .