Need help with my current roster
I'm fairly a new player, been playing for 3-4 weeks now. Recently finished completion of act 3, looking forward to act 4 now. And I have a few questions about my champions. -Which 4*s and 3*s should I focus on ranking up? I have a 3* duped Namor and heard he's one of the best mutant champions, but do I use bishop over him?…