I went black mage with strength, willpower, presence investment and the pale ale and well fed buffs. I had to switch from 2 wizard rings and royal leathers to 2 earthen chains and armored robes just for miko and mai though because otherwise I'd get counterspell/heat weapon locked. I also swapped great heal for Bolstering Dance for that fight since they deal decent resolve damage. My magic resist was only 50+ or so though so I think it might have just been RNG. I was surprised that Power Wave was so strong, even when my spellpower was garbage thanks to the earthen chains Power Wave hit for solid damage. Kazuo's also a lot more threatening because his puppets will start to swarm you when you're not actively taking them down as you don't have teammates to do that for you. Nakano was just "try not to get rng'd."