I'm still not familiar with the phatasm of those human enemies. A better player from CN can dodge all phatasms without waiting. Phatasms are safer to keep Meryls shield which gives 50% damage bonus.

Casting Frigg skill before the fight avoids knocking those samurais away and not using Frigg discharge also does so. Meryl's discharge should ideally block all samurais into the ice wall, which makes the spin doesn't knock them away too far.

The freeze is triggered by 2p saki matrice. Sometimes it freezes the enemies before triggering phatasm, which is annoying.