WHICH 2 6*'s SHOULD I R2?

Slange

Hey guys any suggestions on who I should R2?

I'm thinking Spidy stark or THING but I'd really love to hear your opinions.

LexSavi

Given that you only listed Spark and Thing, I’m going to say Batman and SpongeBob.

The two you listed are decent rank ups, but really can’t give an opinion about your best options for two rank ups, only knowing two options.

Edit: just saw your second post where you added your roster.