Go to Marrowrock North. when you find the first death skull. Make sure
your at least level 8. Make sure you have a long rang and close ranged
weapon, and make sure you have ALOT of potions. Take out all his minions
first. After all his minions are dead  then put on your close up
weapon. Hit him enough so he runs from you. Then use stone storm or
thorny decoy. ( they're the best.) If you use thorny decoy get on your
long ranged weapon. Keep hitting him until your thorny decoy dies. you
can do this the whole battle if you want or you can give him a chance
and you run to the other side of the room. Use stone storm. If he only
has a quarter of life left, charge him with your close up weapon. Keep
bashing him till he dies. Then loot the room when he's dead. when you
find the second death skull, just repeat this method.