easiest for me is kill of 3 shamans and kill it with just pally/shaman, just attack with 3 in the begging to as much damage as you can, after they die just use one shaman/tank to finish it off, as crazy as it sounds I've been using this method since 3rd or 4th week after xpac came out, its really easy that way.
edit. what pinotnoir said :P