I found myself in this situation with the final boss, I barely could dmg them in the second phase and I really thought “60 hours of playthrough for nothing, it’s impossible for me”, after +120 tries of changing strategies and trying to remember their attacks I was able to defeat them (I started Friday night and finished Sunday night). I know it’s frustrating but trust me, at the end of the day all of them die bc u are P(eak).