Raid Shadow Legends Budget Unkillable w/ Ally Attack. Clan Boss trial run 1 (UK falls off)

Budget Unkillable with ally attack trial run nightmare. Stun target(FB) keeps losing Unkillable buff.

Maneater 248
PainKeeper 223
Fayne 232
Fat 181
Frozen Banshee 123

Turn Order:
Maneater - A1, A3, auto
Pain Keeper - A3, A1, A1, A2
Kreela - A1, A1, A3, A2