1. Fog - avoid da fog! As long as he is not in the fog, spam him. We are melee hero.
2. When he open his wing, he is about to spin his knife surrounding him. If you don't have high Toughness, move away.
3. Whenever he do the twirl and warp back to the centre, he start shooting magic dart everywhere. But it's slow and avoidable.
4. At 75%, he is easier. He starts spawn 2 minions. Ignore them, keep wacking Malthael.
5. At 50%, short cut scene. He is getting serious. Run away when he warp back to centre! He'll roll out a few slow moving fireball in all direction. If you far from him, it's avoidable. But those fireball stop before it reach the edge and start emitting fire! You can stay between them.
- Soon after that, he spread his wing! These are DEADLY! Avoid by getting to edge of map or stay behind him. That is the blind spot.
6. At 25% life left, he goes crazy, with more fog and (5). Just avoid the fog and spam him while got the chance.