Updates are getting shorter because I am lazy. And skillsets are getting too big to post fully.
4-1 (Professional villains)
Clarissa: Nightstalker; DS OC, Elem/DS EQ, Widespread, IFF, Action Replay
Elayne: Nightstalker; SS/Enig OC, Elem EQ, Mage+25% IFF, Accelerate
Vin: Strider; Fant/Gadg OC, Sec EQ, Atk+25%
Lluvia has 172 speed, and when he gets a turn, he gives the other two turns, and Trueno uses said turn to one-shot someone. Not cool, with only 3 PCs, and 172 speed being quite fast.
Unfortunately for Trueno, he is vulnerable to Rob Turn. I deploy Clarissa, Elayne, and Vin for this battle, with Clarissa and Elayne as Nightstalkers to get the drop on the battle and give me two shots at Rob Turn via Turn Shift. From there on, it's a matter of spamming Rob Turn while attacking the brothers with Devastate and other attacks. Viento has high evade so physicals don't really work on him; the other two have high Def and Res which aren't nearly as potent.
4-2-A (Rupert and the river)
Clarissa: Emulator; DS/Elem OC, DS/Elem EQ, IFF, Widespread
Elayne: Emulator; Elem/Fant/SS OC, Elem EQ, Mag+25%
Levin: Martial Mage; Emu/SS OC, Elem/SS EQ, Widespread
Three bosses in a row with Rob Turn vulnerability? Sure, why not. I can't get too attached to this, though... anyway, Levin finally gets a chance to shine as we're finally facing human, non-undead, non-boss enemies, and decent numbers of them at that. 75% widespread petrify for all!
My setup here is pretty flawed for Rupert control beyond Rob Turn. I am able to nuke his MP, but he's still annoying because eventually Clarissa runs out of MP and I don't have either Debilitator or Mesmerise here, more fool me. Still, I manage well enough. It's made a bit trickier due to some bad luck with the status, so there are some nervous moments and a death or two, but nothing unmanageable. I still hate Sacred Slayers, incidentally. I always underestimate them until they are getting infinite turns.
4-2-B (showing off the tier 4 classes)
Three of each tier 4 class here, though none of the Emulators have new skills. Anyway, setup is pretty similar to the previous battle overall, dropping the boss-killing skills. Widespread Petrify and Exploit Weakness for all! Though, I do learn one annoying thing here; I had assumed petrified targets were always hit despite the listed hit percentage, but it looks like 0% still misses. Annoying, but fortunately this only matters for Extremists, and petrify still leaves them sitting ducks for Exploit Weakness beatdowns.
4-3-A (Paigoels and the offensive emulator skills)
Offensive emulator skills! Hell yes!
Oh, yeah, there's a battle here. Anyway, the paigoels have 1500 HP which is monstrous. That pretty much makes them bosses. Except you know what's not boss-like about them? Their petrify resistance. See you, losers.
The Zortroa have started putting Fantastica OC on top of their other tricks, and Slow Down is pretty annoying, but nothing that can't be handled. This map really needs more enemies to be threatening, seeing as they all have elemental and status weaknesses.
4-3-B (Chelle and the stealth stalkers)
Fuck Stealth Stalkers.
IFF Devastate and keep allies in range, blow them up. Elayne's is powerful enough to one-shot, even. I guess Clarissa's might be too if I shifted her to Elementalist but eh, not needed. I get lucky with the instant death, just kept some Revive Fruits on hand if need be. They hit pretty hard (3HKO damage, accurate) but nothing unmanageable. Petrify and weakness-nailing for the Zortroa, who are inept since they don't start close to their pets for once.
Oh, and Chelle? Vulnerable to sleep. 75% sleep is good times. Slow Down and Debilitate to make it all the harder for her to wake up, then beat on her with Devastates and Blast post-Fragile. Sleep is, apparently, a shockingly bad weakness to have. Who would have guessed?
4-4 (Professional villains times four)
Today's key to victory is: defence ignoring! Sacrifice and Innocent Blow are my friends, so Vin comes back out to play in place of Levin for this fight, as a Nightstalker. Elayne mostly plays support and healer. CLM Up lets Vin navigate all over the battlefield very easily, which helps her go up and kill the brother who is high up before joining the other two PCs. I take out the clones periodically with MT stuff but it's not really necessary, only the real deals to good damage.