I never play as one so I hadn't really thought about this...but I do use Keldorn a lot in BG2 (He's a great character in a good party)
My question to SCS users is this: The spirit of this is to make the game a bigger challenge...but how powerful is that x2 your level for Dispel Magic? The description claims that it's far more powerful than most enemies you face, ...so what do you guys usually set this at and why?