Just make 1 character healer (usually Saeko), and thought other make magic elements damage only And Ishioda 1 is very easy boss fight, how you cant progress thought it... He inside that machinery just have insanaly huge hp and all physical damage resistance, and few good moves. That's all. Honestly, how you goonna beat 12 and 14 chapter bosses, lol. Because they are shitfest, in some ways harder then final one But that Joryu thug at least have a manifest not to attack girls)