Again, swarming is going to drop the wizard more often than the fighter, before he can do anything effective. But it is moot anyways, since the DM is going to stack things to make the encounter challenging. He has to, because combat likethis against a sigle opponent that is a PC class and Race is going to end fast in 3E. If I am sending the party against a fighter of that level, he will have really cool weapons armor and wonderous items to keep him in play. And the battlefield is going to be laid out so that the battle lasts. If I send the party against a wizard, it will be set up so he at least has three rounds to squeeze off good spells. Summoning is great, but usually the wizard is dead the next round. The important thing for the wizard is make sure he has distance from the party, and his protection spells in place. The fighter needs items that improve his movment around the battlefield and make him really hard to hit. Both can be made into a challenging encounter. But PLaying them straight, they are both dissapointing.