Who is better to upgrade Elsa or Black cat

Sohail46

Who should I upgrade first
All of the are unduped same rarity
Elsa Bloodstone OR black cat
Guardian OR nebula
CMM or Sliver surfer

Gogeta91199

Who should I upgrade first
All of the are unduped same rarity
Elsa Bloodstone OR black cat
Guardian OR nebula
CMM or Sliver surfer

Elsa and black cat I can’t say for sure, both are solid damage dealers and have there uniques set of abilities.
I’d go for nebula because she doesn’t need her awakened ability, is triple immune, that sp2 melts opponents and the build up isn’t too long whereas guardian is over all a better choice when at high or max sig. and CMM over silver surfer easy.