I've soloed through BG with a fighter, in the final battle, I used a lot of invisibility and healing potions. My tactic is charge Sarevok, get badly hurt, turn invisible, heal myself,draw upon holy might,fight again,repeat as I can. But I think I just got lucky. Any better method for killing that son of b****? (I mean son of Bhaal)
Perhaps using a Scroll of Protection from Magic and peppering him with Arrows of Detonation... Never tried that myself.
[url="http://www.sorcerers.net/Games/BG2/SpellsReference/Main.htm"]Baldur's Gate 2 Spells Reference[/url]: Strategy, tips, tricks, bugs, cheese and corrections to the manual.