That was pretty unlucky for him, one time Dharock almost killed me but I just about pulled through. I was in the tunnels at the chest and Dharock came out when I opened it, I got his hp pretty low but then my prayer ran out and he hit a 54 on me, then I hit 0 on him, then a 0 on me but then my last blast killed him :D I always kill all 6 of the brothers and few other monsters to get my kill count upto around 15.