For those of you having frost imp trouble in the Gods of Thunder mission....I just played through it being careful not to trigger any of the 'humility injectors'....and didn't have any problems finishing the mission.
Also, regarding the clone-bots mission....I was able to squeak by just barely using x-force wolvie.....as someone mentioned before, having your summoned helpers attack is a good strategy. But even still, in the last battle vs. jean grey/wolvie/iron man I took my time to try to lure one at a time into a previous room and take 'em out separately. I haven't tried it yet, but I wonder if Ms. Marvel might not be a good hero to use in the clone bots mission. Her P2 is full armor boost, and while it won't protect against the 'just dance' attack, she should be able to weather the many knockdown attacks, right?