When I did killed him I ranged from level 10-26 and every single one of my characters leveled up 8 times! I ended up with a level 34 barbarian and level 34 Assassin. He's level 482 with 8482 hit points and gives 10,338,538 experience total on normal difficulty. He's not nearly as hard as he sounds. Just dodge his whirling dervishes and remember to heal.
-Jafin
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I may look like an old man now, but just you wait until I take off my fake beard and wig and show you Tiltowait!