first, set a 7 point magical attack spell to a hotkey, along with a 3 point, when the zombies start to appear, cast a seven point as the third starts to warp in. if you mess up, just run around kinda close to him, circling around the zombie, he should end up killing them. After you hit him with the seven point, you should end up at point blank range. He will start to stomp at you, just keep moving. He should pause and turn blue, then hit him with the three while he is flashing, repeat three times and he will die. (dont use the seven when he is trying to step on you, he will cut you off)