This game is so janky lmao.
Hyenatron was also way easier than Frigg at Stage 20, though I did abuse 1* Coco to heal back to full since she did like 90% of my health lol.
You don't have enough buffs by Frigg, her combos have tons of hitstun that just lock your dodge out, and she does way more damage. Hyenatron just does really telegraphed easy to dodge attacks and dies.
C0 Crow, C2 Cocoritter, C1 King
Obviously choose only attack buffs, also be aware that you only get the base stats initially, you do not get the listed ability until you get stacks of 4 and 8 of the same buff.
Scuffed video, forgot to change resolution, and funny chat in background playing another game.