You just saw what happens when you cross the genre border from RPG to bullet hell. No amount of grinding will save you from the bullets a true final boss will rain upon you. Megumi can eat it.

Also hi, nice to meet you! If it's any consolation, the chances of Kreutzer turning all of those bullets on Sasuke are slim. Dem rules keep it from happening, but you really have to piss her off to see that 8D