So I'm assuming most campaigns have little to nothing in the way of mental attacks?
I made a big bad once that specialized in mental attack magic. It was a bit of a nasty surprise for the players, who had been steamrolling their opposition up until that point, but its not the kind of thing that you can throw at them all the damn time without it wearing thin. Interestingly enough, he hurt the nonspellcaster a lot worse than the spellcasters, because they had a high enough discipline skill to give them a chance at resisting the attacks.
I've never seen a fight where either a.) the wizard runs out of juice before finishing off the bad guys or b.) everyone, not just the wizard, gets their asses handed to them. The pacing just works out so that fight scenes lasting more than four rounds just don't happen all that much.