[SixOfSpades]

While I'm not disputing the fact that Wizards are the hands-down asskickers of BG2, you guys are selling the other classes rather short.

Cavalier with 95% MR (Carsomyr, Amulet, Gaxx, Cloak) vs. Sorcerer

I'm assuming SoA here--no Hell Trials, no 9th-level spells, because as soon as the Sorcerer has access to Time Stop and Shapechange, debate becomes rather pointless.

The Sorcerer has to open the battle with SI:Abj, because otherwise his PfMW will probably fall to a Dispel Magic from Carsomyr or the Cavalier himself. He can be comfortably protected by the SotM while he does this. During this round, the Cavalier is probably casting Animate Dead or something.

Now the Sorcerer can put up PfMW, and start casting Lower MR. At -27% per round, three castings of it will bring the Cavalier down to 11%. Unless, of course, he's equipped himself like any thinking person would have done, and simply slapped 5 Potions of Invisibility in his Quickslot. Ooops! Wasted spell! And even if you used your Spell Trigger for them, all you've done is lower the MR of an enemy you can't see anymore. Even casting True Sight won't be much help: You still can't see him if he had the brains to simply leave your sight range. And even with his MR gone, you've still got his Saving Throws and Resistances to deal with.

So don't underestimate the other classes; assuming they'll just stand there and let you shoot them is completely nonsensical. True, the Sorcerer can always get away (when the Sorcerer comes back after your buffs have worn off), since the SotM's invisibility will not fall to Dispel Magic. But still, all the Cavalier lost in this battle is a single Potion of Invisibility (unless you count the Animate Dead).