

This is what happened: (try to follow along, I promise it's worth it)
(visual aid, unrelated screencap)I wanted to emulate the FRobin method. It didn't work, because Effie's too strong so she hits the red cav into range where the armor knight can warp next to it, and then I can't kill it while it KO's Effie. I tried many things. Among them, I found out I have no healer with the balm that raises defense, and other really specific things. What ended up working:
1) Switching the Steel Lance for an Iron Lance, so Effie's first retaliation leaves the cav with +50% health
2) Hitting the armor knight with FRobin as usual (+ dance to get her out of harm's way)
2) Attacking the cav with Effie after the first retaliation, leaving it with 3HP for enemy phase
3) On enemy phase, the ninjas attack first, then the cav commits sudoko on Effie (thank god the ninjas attack first!!!)
4) Advance Effie to the right, hitting one of the ninjas (the ninja is standing where the 90 degree turn is, and the armor knight is above it)
5) Hit the armor knight with FRobin again (down to 3HP as well)
6) The crux. Only one of the ninjas can hit Effie. I think this is what ended up happening: the lower ninja broke the wall under the ninja in the turn, who moved where the wall was, hit Effie, and then allowed the armor knight to warp to below Effie (to the left of the injured ninja, above the lower ninja, for perspective). The dude hits Effie and leaves her with 1HP. :colbert:
7) I had to improvise on this turn but holy shit holy shit. LISSA MOVES IN. Kills the armor knight by standing to the left of Effie, then the magic: Olivia dances above Lissa, and she's out of reach. Lissa Rehabilitates Effie to full, then Effie SMITES Lissa out of harm's way. Holy shit holy shit holy shit

The ninjas are stuck facing Effie and there's nothing they can do
10 stamina potions and most of my gems are gone. I also had to promote Olivia to 4* because I forgot to teach her Hone Attack, and you need that to one-round Ursula..
Worth it.