Easiest Exhibition, as long as you know what you're doing
Scathach will apply 3-turn NP Seal to frontline with high crit chances, meanwhile Cu will keep spamming PfA.
If one of them dies, the other will insta-kill the whole party the next turn, so get rid of them at the same time
Kagami no Kuni no Soudou - Mahou Tsukai no Yoru
Kara no Kyoukai (Shiki's Theme) - Melty Blood: Actress Again