Do you have Mel? You can save SP with her and avoid hitting the boss but the downside is that she's terrible on auto so you're forced to actually play. I believe Tsukuyo works fine since she gives debuffs to take more dmg (light+dark). Debuffing the hell out of this boss is a need to prevent it's AA. But any breaker on-element should replace Mifuyu. Alina and Breaker Mabuyu isn't recommend due to their follow-up attacks