Help with the last battle in season 2

[yelnats_24]

Even 3/60 Boril+Cyprian is enough.

@yelnats_24

Normal Mode:
Double Riposte Unmaxed Classic Only 4* with 3142 TP

Final Battle:
When you lack firepower, use your enemy’s power to your advantage. I feel bad for Boril and Cyprian as I don’t give them ascension materials they deserved… Each time Ursena fire her special while whole team riposte active, it damage her around 4000 hp.