Have Tiger Jump and jump around all you can while just using skills to lower his armor. Use the buffs potions from the elf (they REALLY matter). when his armor is about to break, use Sprint and try to deal the max damage you can, until his hp is low enough to die in one bladestorm( this skill should be able to get at least over half his hp when you have the attack potion and berserk), then simply lower his armor again, and use bladestorm. It should wipe it out.
