Okay so, I think I might be a bit underlevelled (or just not have the stats since I put all my points into charm), but I'm having some major issues with the boss. I also overwrote my save before it on accident since I was on the save tab rather than the load tab. Any advice or anything I can do to cheese it?

spam heals my friend I also had all charm status and just heal stall or do a different action if you died (press back to change outcome) and pray to the lord and savior rng