Chillblains+RW blood boil coupe of time for aggro and KITE KITE KITE KITE, shouldn't be hard really. if you don't like kiting, reforge for parry and use DRW on CD. Also your chillblains affects turtles :P
Don't be affraid to get external buffs like safeguard(warrior) life grip and stampede in addition, prepare yourself for stomps(aka build shield) and use AMS for mitigating those falling stones if lack of RP.
Also, NEVER stay on the middle run in circles around the room(start close to the boss for ppl to cleave though DPS shouldn't be much issue)