u/Dex__F

Im playing a team of Hiyuki S0, Lynae S0 and Mornye S1. I don't have Chisa and I have 360 corals that I can use for a sequence.

For this team, what would be a better upgrade?

Hiyuki S1 increases the DMG of her basic attacks by 120%, pulls enemies and applies Glacio Chafe on her basic attack.

Mornye S2 provides a Crit DMG buff up to 32% and off tune build up by 20%