Who should i R4?

Noturfriend1

So i have Enough Catalysts to R4 Mephi or Hela (duped) both are 4*, Who should i R4?
(P.S I don't know how to make a poll)

jojodeth101

Firstly: Mephisto is better than Hela. Second: when you click "New Discussion" then you click "New Poll"

Noturfriend1

Thanks