this was inspired (totally not stolen) from roboticanimations' dimention of despair. step 1: remix, add your character, hp, etc. step 2: either let them go first or you go first step 3: remix step 4: repeat step 2 and 3 until all bosses are defeated.
I don't kill characters unless I have to or they killed one of my allies or my character isn't pacifist.
