So the major objective mistake there was using Da Ji's wind resist buff on turn 1 instead of saving it for the overdrive. That's a 40% cut to damage thrown away.

The other thoughts I have are more reflective of my preferences and may not necessarily be actually better for you, but some options to consider:
1. Move Konohana Sakuya into Acala's starting slot; Acala moves to first bench slot. Switch Gawain's ex slot to Black Propaganda.

2. Move Konohana Sakuya into Acala's starting slot; Acala moves to first bench slot. Change from Gawain to Joan. Switch Joan's ex slot to Ambush (that's Gawain's def debuff, right?). You either spread out her damage cut and Da Ji's wind resist buff to reduce two separate overdrives' damage by 40% each, or use them together to reduce one overdrive by 80%. Bonus: the +double aspect of Joan's Orleans' Call is actually in its own frame. It should stack with Da Ji's combo atk buff.