Three boxed them at 115, arcstone one was a bit of a pain until I just smashed the adds that spawn after a golem kill, lost the merc tank a few times on those which meant zoning out to revive him before going back in for the next golem. Even at 115 with all merc aa he was still pretty weak.
I cheesed the arcstone one so hard on my first kill i got a lactose intolerance from it. Four mobs, six wipes, got the kill.