Three Goddesses, Akyuu speedkill - Touhou Souzinengi V -The Genius of Sappheiros-

game:
store.steampowered.com/app/21...
playlist:
• Touhou Souzinengi V -T...
Three Goddesses (pre expansion final boss) on hard difficulty. Except I kill phase 3 in a single turn. All that's needed is Akyuu doing the Roman salute. (Akyuu learns Hyper Weapon after she records 16 Aquatic enemies)
With every buff in place for phase three, I ended up doing about 120.000 damage. One thing worth noting, Akyuu's buff only doubles the attack strength of the first attack a character uses - so for Youmu, her first slash does 40k while the others do 20k each for a total of 80k damage.
There's still a lot that can go wrong, and of course there's a chance that phase 3 attacks either miss or are blocked by Athena's Shield, but Alice can help you survive another turn.