We love playing with Super Powers companion 2nd Edition since it gives us all the flexibility for character creation we want while preventing the usage of the simplistic Powers found on the base core book.
Even though we're enjoying blasting through normal Extras and small monsters, I can't seem to build boss battles fitting for Street Fighter Power Level, specially since my characters are "legally" over powered. The problem is that having characters that hit from Str+d6 to 6d8 a round, even on Large-Mid Templates, becomes too much when we consider every die CAN be an exploding die. It's happened before, with my players getting anywhere from 5 to 7 exploding dice and hitting 45+ damage in a single round. Not even soaking I can come around this, and rules such as Fanatics do nothing for the combat either since Extras are doomed to be fried immediately.
I feel the main problem here is that the exploding dice prevent any mook or boss from even moving, no matter the bennies, and I also feel taking the exploding mechanic away would hurt more than help... But this game became too furious and fast to be even fun for everyone in the table.