[3.5] So... um... Pit Fiend?

[aivanther]

Blast it really really hard? I mean, I'd have to see the mechanics of your build, but theoretically a charger should be able to smack it pretty hard with its first hit, especially with enough pre-game buffs dropped on you. Follow that up with enough damage via the wizard (twin spelled 12d6 orbs perhaps should smack it for a good 80 points of damage). With a decent surprise round, this MIGHT actually get him down fast enough to save your hide (bad solution, I know, but still theoretically possible).

Or have the wizard hit it with a twin spell, split ray of dizziness. Force it into an action economy crisis to give yourself more time to beat on it.