Enemies are too tanky lately

I used to be able to clear stages pretty smoothly with the Flova setup, but the endgame content is really tough 😭 Even with 4-star Cartezia, it feels like it's already inferior to Hiyuki... Maybe my rotation is also bad! While thinking that, I'm meticulously selecting soundbones... I'll do my best to get at least 4 sub-stats 😭😭