I was a 295 stormcaller, my buddy was a 295 Nightstalker and our other clan mate was a 294 Sunsinger. He rocked a sword (solar is best) and he would smash the boss until he died then self res, hit him a couple times and then run. I would rocket the boss and then electrocute the adds when they piled up. The hunter tethered the whole room and made enough orbs to fill both me and the Sunsinger. Rinse and repeat. Also take out the blight as absolute first priority.