If you defeat Ophelia (all attack max damage attacks first round, only angie's magic attack second round, she isn't past her health threshold so she doesn't heal, Ami magic + maki attack 3rd round defeats her), she just respawns with 0 health, and you can keep attacking her at 0 health, killing her, and so long as you kill her on your last attack per turn she just respawns and gives you your turn back infinitely. I am guessing that is supposed to be a "no win" battle, so you probably want to make it so that her healing threshold is at least 3060 (the max damage you can do per turn), and her max health is at least 6121 so that she can definitely attack you between heals.