Roster advice please
Which characters should my focus be on upgrading? I have beat act 4 and am working in exploration of it. Are my 3 5\*s good enough to be worth upgrading for long term gain? Or should I be more focused on the 4\*s? Or half and half? Advice please.
Also, any good guides for playing as KM or Luke Cage. Luke is just normal and use sp1 for the stun, right? What about KM?