[LennonCook]

Sorc has less spell variety. Oh, boo hoo.
Sorc can`t scribe scrolls. So what ??

When a sorceror learns a new spell, he has no chance of failing to learn it, no matter what the difficulty level, no matter how smart he is.
A sorceror can quite literally be a braindead obese twit with no decision making skills, who has trouble carrying a pea, moves so slowly that he can`t move at all, and who everyone wants to kill on sight he`s so ugly, and still make it through the game on Insane Difficulty.
A mage in that situation I`d be surprised if they made it out of Chateau Irenicus with Jasper`s help.

On multi-class mages... *any* Multiclass has a high cheese potential, if you have TOB installed. Take for example the Fighter/Cleric... two shots, enemy chunked. Mightn`t work too well against a mage, though... takes two High-Level Abilities, and cast two spells. Anyone care to guess how ??
(Guesses via PM/IM please).