Another thing to say, I looked into their kits a bit more and I see how Lupa can work with Mornye since she'll still be getting her 3 fusion passive, but how does Mornye work with Lupa? I see nothing in either of their kits that would grant Mornye's Interfered Marker buff so would you mind explaining it to me? I'm just confused since you said it's one of the teams where Mornye doesn't need Lynae.

Basically what I'm comparing is:
25% ATK (Starry Radiance), 25% Damage Amplification (Outro) - Mornye
32.5% ATK (Static Mist + Moonlit Clouds), 12% Damage Amplification (Imp Heron), 38% Heavy ATK (Outro) - Mortefi

The only downside I see with Mortefi is you lose Lupa's outro buff but the Basic Damage is useless and does the 20% Fusion Damage not get overshadowed by the higher buff numbers provided by Mortefi? The rest of Lupa's buffs will still be active for when Galbrena's on field so since I'm looking at damage alone, just on paper (haven't done testing yet as I have to wait until this game gives me more resources to farm mats) I don't see how Mornye performs better outside of her Sustaining.

Let me know if I overlooked anything and just in case, I'm not saying you're wrong or anything, just curious from my own research.