Since chaotic nations don't save anymore and there is a lot of work to gather plats/arcs maybe you could implement an upgrade system for chaotic boss drops. Say you get satan's ace normal item, and you don't want to camp for a rare or legendary one. It would be nice to upgrade it from normal to rare and then legendary with recipes like thanatos wings. And when you reach upgrade lvl 5 the item should upgrade from normal to rare or from rare to legendary. This way you ca farm your ass off and upgrade it instead of camping for days and get frustrated that it does not drop. Still a lot of work but it's garanteed to get the job done.
