Never be 100% meta

Torment 2T, rather safe
DOES require 3x Kayoko normals, but you can whiff the 3rd normal up to twice and still be safe (you need the first 2 in a row, but the 3rd there's leeway). You only use Kayoko's ex twice: at the start, and on the last CC circle (specifically, wait it out as long as possible--so when Wakamo is about to bring out the giant gun again)

You can/should not quit out after phase 1, instead keep using NYFuuka/Kisaki/Mika as much as possible in phase 2. Doesn't matter if you're down 1 student or not from phase 1.

In phase 2, the initial rotation I went with is a bit goofy, might not be optimal. Obviously, PNoa is better but I don't have PNoa. It was
Meru (ASAP) > ~9.9 Ako > wait until the turret can be targetted > Neru > 9 Mika/Himari > Meru (ASAP) > Ako (ASAP) > wait for Neru to use her normal skill > Neru > Mika

After that it doesn't really matter at all you can kinda do whatever (you can even use Maki once or twice, though I wouldn't advise it)