Mornye S1 Significance for Future Hiyuki - Lucilla / Aemeath - Denia Team

Was wondering if anyone has a guess whether Mornye S1 will be significant for future Hiyuki - Lucilla / Aemeath - Denia teams as the 3rd character?

I want to complete these two premium teams, and right now it looks like they'll be competing for Chisa as the 3rd character.
For now Hiyuki is paired with Lynae, so Mornye S0 is very sufficient and would allow running both teams together at a good level.
However when Lucilla comes, I'm wondering if Mornye S1 will be important to prevent Chisa overlap. I don't have Lupa, so no running mono-fusion for me.

Does anyone know how important/strong would Mornye be for Aemeath - Denia team, since we only know Denia's kit for now?
I guess there's the possibility that Lucilla can apply tune strain to activate Mornye's buff, but am wondering how things stand at this point in time.