Ok of we are playing with op characters, John de Lancie. Best known for Q, also Odin, Santa (multiple times), mr. Twister, sinestro, some guy named ted, many others, but really all he needs is Q. He would have an army of all powerful entities to call on.
I think what makes Jim Carrey dangerous is the insanity factor in his team. There are tons of all powerful characters to throw at the board but how many are just insane vs how many are just bored. That said its really going to be decided by how long until the other versions of jim drive the two power versions of Jim totally mad!
Your theory has a big chance of backfiring and the Jim Carrey's will surely start fucking up eachother either on purpose or not at some point as teamplay would be hard.
I believe I am winning, Mainly due to the fact that You are stuck having responded to me and will never climb the mountain of Jim Carrey because of it!!!!
I am going to purpose a crazy actor. Jim Carrey.
You have a load of absolutely bat shit insane characters many of which are pure evil (grinch, riddler, Cable guy, Ace ventura pet detective, etc...) to mentally destroy and toy with two versions of himself, one is the mask who is potentially all powerful... and the other is Bruce almighty who is actually all powerful.