Beat the Sentinel Factory. I got Wolverine KO'd really early in the stage, and I put Nightcrawler in his place. I think I'm going to stick with that. The computer can't use Colossus and Wolverine worth moldy beans and they're both totally physical, so there's not much point in having both. Nightcrawler has this spiffy skill where he saves allies if they get killed, once a minute, and if they're in a certain range. I upgraded it to max, so he always saves a falling ally within 60 feet. The catch for this skill is it doesn't work if he's being player controlled. Seeing as how I never play as him, that's not much of a problem.

HOO BOY that stage was a bitch. There were this hideously irritating Sentinel Platforms that, on top of taking a million hits to kill, were constantly firing really powerful beams. The first two I spent the stupid minutes killing. The third one, I just said "Fuck it" and ran from it.