How about, int +3 and cha +4. He should have plenty of skill points, we can easily give him both Bluff & Diplomacy, so charisma would prove useful. Also, he sounds charismatic (when he wants to be).
Dont know what items he might have, but Epic Headband (+ something or other to intelligence) is an obvious choice. Still think he would benefit from another self-made magic item with unique properties though. Perhaps Sahak's Staff? Im not sure what properties it should have though.
I think he would pretty much have access to every spell in the book, due to his level and diversity. And, added in are those unique spells of his. Epic spells, I cant think of many. He's already got an Epic high-damage spell.
I gather he wouldn't have any melee weapons, he doesn't fit the melee type. So, we can therefore assume that his combat style would be one that was concentrated on staying at a good range from his enemies. Also, it sounds as if though he doesn't like combat in the first place, so such spells as Force Teleport and Sahak's Maze might be good opportunities to spread up the attackers so that he could concentrate on one at the time. He obviously doesn't prefer a fair fight. If he could, he would probably hide behind his minions (amongst those, his horrible little Gargoyles). I would think he might have a Golem, perhaps two around somewhere, minor summoned demons or devils and his mortal minions controlled by spells and brute power. I think he is the kind of guy that ALWAYS has a Quickened Teleport memorised
