I use Dorm w/ Dark Hole assist instead of Sent sometimes, but the huge weakness is that the team doesn’t have an awesome assist to get Hulk (or even MODOK) in. Dark Hole is decent up close, and Hulk retains his 950,000 combo in the corner if MODOK dies. In fact, I never thought about it, but MODOK could have psionic blaster as his assist since Dorm’s dark hole fills the job.
Any of the characters with a godlike assist could fit the team though. I wouldn’t recommend Haggar lariat or Tron fire though, because 2/3 of your team will have trouble against zoners. Doom could definitely fit. Iron Man and Magneto beam assists could fit well too. Basically any character with a good projectile assist.