Alright, just beat the game a bit ago and got the bad ending so now I'm trying to get a better one

Anyway for me the 2 hardest bosses were: Last Judge and this gauntlet room, seriously how the fuck are you supposed to beat those 2 heavies at the end? I just clung to walls, jumped around like a panicked retard and spammed tools praying they die, there's literally no room to fight them legit