I've been trying for like an hour, and I think I can comfortably declare Abbi impossible under the conditions of the challenge. Even if you wanted to Persist every turn with Sunny, her attack that makes you Afraid means that he can't use Persist the next turn so he's basically dead even if you heal him, both because of his low health and her attack which guarantees the next hit is a crit. And the Sno-Cones barely make a difference at all since she just lowers your stats again anyway. Again, 5 attacks per turn is untenable. So that's all for me for today, once I give the Fear fights, -heart fights, and Boss Rush an honest try I'll probably just take a victory lap by cheating egregiously to beat them.