I joined a group from LFG last week to complete this quest. I used my hunter, bottom tree golden gun with nighthawk. The other two ran a tether hunter and nova bomb warlock. The whole strike took us an hour and a half. Most wipes were caused because we missed a thrall or two and they wrecked us. I was using breakneck, inaugural address and hammerhead, but ended up switching to thunderlord, i think.