WA2 defending gives the FP you'd get if you didn't Defend, so it's more relative to the damage you take, but not more overall. Just throwing it out there.
Godlike:
Cloud of Darkness (FF3) vs. Rosa Harvey (FF4): Bad Breath, or a simple "lol double physical ur dead". Rosa could probably pull this out against 3o? Not sure.
Ted (S4) vs. Violetta (G3): OHKO. I think she pulls it off by stat topic numbers? But I see Violetta's damage a bit higher anyway.
Sir Leopold (DQ8) vs. Patriarch Sergius XVIII (XS2): Don't think I'd see ITD crits ignoring his weakness to physicals. And Patriarch sucks at damage, and Leo has 50% stat down resistance (which is good for a DQ8 boss, not sure where Dhyer is coming from).
Albedo Piazzola (XSs) vs. Sephiroth (FF7): Yeah.
Heavy:
Hallec (S3) vs. Ashley Winchester (WA2): Pyro summed it up pretty well. Plus WA2 endgame above 50 is pure nonsense to me, at that point you could summon-nuke everything in existence off the face of the planet and while WA2 enemies are bad, they were clearly designed not to be quite THAT bad. (Also I was 41; I am open to arguments I was underlevelled, but not by 10.)
Dycedarg Beoulve (FFT) vs. Seed (S2): Don't think he's OHKOed.
Middle:
Alen (S1) vs. Eileen (S1): Poor Alen. On the other hand, we finally get an Eileen run?
Barret Wallace (FF7) vs. Elena (FF7): Charm blocker, should... probably get a decent limit off. Good HP helps.
Ronnie Bell (S1) vs. Darksol (SF1): Darklol.
Light:
Snowe Vingerhut (S4) vs. Sten (BoF2): STEN! Gut says Sten can pull it out, since he puts a lot of pressure on Snow's slow and highly limited healing, and the uneven damage due to crits is not somethnig a healer likes.
Bartre (FE7) vs. Maria Balthasar (XG): Maria fails to double.
Melody Vilente (WA3) vs. Connie (S3): Connie.
Augst Henriksen (WA4) vs. Titania (FE9): Augst. ;__; So close to Augst/Connie.