Used the following for today's since Caster enemies are easier to refund against. No CS needed.
Turn 1 = Saber Caster 1st, Saber Caster 2nd -> Da Vinci (Rider), Saber Caster 3rd -> Chen Gong, Plugsuit Saber Caster -> Paracelsus, Paracelsus 1st and 2nd, Paracelsus 3rd -> Chen Gong, Chen Gong 1st -> Da Vinci (Rider), Paracelsus NP -> Chen Gong NP -> Da Vinci (Rider) NP, Chen Gong and Da Vinci (Rider) both having at least 90% by start of Turn 2
Turn 2 = Gilgamesh (Caster) 2nd and 3rd, Da Vinci (Rider) 3rd, Gilgamesh (Caster) NP -> Chen Gong NP -> Da Vinci (Rider) NP, Chen Gong and Da Vinci (Rider) both having at least 90% by start of Turn 3
Turn 3 = All of Jeanne (Archer)'s skills, Plugsuit Attack Up, Chen Gong 2nd if needed to charge up, Jeanne (Archer) NP -> Chen Gong NP -> Da Vinci (Rider) NP
On days where I've 27/27 before, pretty much have to use a CS to charge up initially or at the end to get all of them unless you just give up any CE bonus whether it be points or QP. Since we get a CS/day, may as well use them. On the days where I'm pretty sure I can't 27/27, I'll settle for 24/27 by using Saber Caster #1 | Chen Gong | Jeanne (Archer)/Da Vinci (Rider) | Saber Caster #2 | whatever useful AoE for that day | Paracelsus, with CEs used either 100 HNS, 50 Painting Summer, 100 Black Grail, or 100 Smiling Face.