Who is Best 5* to rank up to r4

Bala_riyz01

Hey guys please help me in rank up my 5*'s i have 3 major choice i don't run suicide and my level is 55

1, kilmonger
2, magik
3, symbiote supreme

Suguchi_Affu

Can you give a bit more information? What are you other champions? Do you need aw attackers/ defenders? what path do you run. It makes it easier to tell you what's better for you rather than which is a stronger character. Also it depends on your play-style.