Who to remove from defense roster

Grizzly_18

Just pulled 6 star omega sentinel and I'm gonna r2 her and put her on defense. Should I remove Galan, Moleman, or Penny Parker to add her (All are r5 5 stars) or keep my current defense?

Wu_Bangerz23

Galan is easy if you don't bring armor heavy champs ...moleman is easy if you are patient and remember not to attack his block....I'd prob say moleman of the two though. Then again, I'd probably rather remove galan soni could use him on attack