The basic idea- let us play with teams we are otherwise unable to use by requiring that at least 2 people on the team be the “same” character (e.g. OML + Patch).
Boosted Characters: None by themselves. All characters get +50 levels for each “duplicate” on the team.
Essential Characters: At least 2 on the team must be different versions of the same character
Locked Characters: ???Not sure if you would want to lock out the game’s unique characters and restrict it to only duplicated characters or not…
…Anyway, just a thought. It’s something different, anyway.