Well, I dragged myself through Ch17. The right side was surprisingly easy once I left behind some of the dead weight characters that were no longer helpful. Took plenty of trickery and careful strategy as usual, but just one attempt.
But now I'm face to face with this fucker.
Renha
Swordmaster
LV15
HP 66
Str 32+5
Mag 3
Skl 39
Spd 41
Luck 39
Def 21
Res 19
Move -
Sword A
Amatsu, Noble Rapier
Accuracy +10, Avoid +10, Sword Expert, Astra, Vantage
My fastest character is MU at 33 Spd. Without buffs, I have absolutely no character capable of surviving a single round against him. With Krom in Double, MU can avoid both the double and the 2HKO to last two rounds, but that's before taking the lava floor into consideration, so he still needs healing. Then there's Astra. If he activates that, his damage is precisely enough to kill Krom!MU at full HP. If MU gets any Def or HP during the map, he'll be able to survive to get healed if it happens on the player phase, but if it's on the enemy phase, the lava floor will kill him. The only way to work around this is to give up the enemy phase entirely and use either Rescue or Olivia to pull MU out of range every player phase, my whole team taking damage from the floor the whole time. Did I mention MU isn't looking at doing better than a 4HKO with shaky accuracy?
Of course, this is all after I get to Renha. In the meantime, I have to slog through a field of Swordmasters, Sages, Warriors, and Griffin Knights. The Swordmasters have 35 Spd and double everything, the Sages hit crazy hard and at range, the Warriors have a ton of Str and Counter, and the Griffin Knights can fly past my defenses. I'm not even sure where to begin thinking about how to slog through this, and the only thing keeping me from saying I can't imagine how it could get worse is the thought of Ch19 ahead.