Godlike:
Myria (BoFs) vs Ghaleon (Lunars): Nearly twice as much durability, over twice as much speed. Chaos Shields aren't making up for that.
Heavy:
Alena (DQ4) vs Ultros (FF6): There are various views of each that can swing this, but for myself, I vote on Ultros 2, and he only has something like 65% average durability, which Alena can one-shot.
Middle:
Milda (G1) vs Nash (Lunar): Well Milda one-shots Vormav easily enough, we move on. Milda vs. Nash is... weird. Milda can block every status Nash has except Stone, which is only turn 2. And she can one-shot him. But according to Dhyer she's slow as molasses, such that Nash instant doubles her. Wow. I don't remember Milda being -that- slow (62% even before any equipment monkeying... sub-50% by my views if she blocks status) but I guess that would cost her the match. Oh well, tiebreak for the fact that even if Milda isn't instant doubled she may easily lose anyway to 65% stone.
Light
Jean (BoF2) vs Rafa (FFT): Rafa gives up some damage in order to block death. I imagine it's probably still enough to win, though.
Kuja, Asgard, Simon, Alena, Ultros
Sure, I'm on board with the "Alena beats down everyone" hype, minus some respect for Simon, whom she 2HKOs well enough. Hell, she might even 3-2 him. Not so sure about Alena vs. Asgard, as Alena should need 3 shots for that and may not 3-2, and I don't see anything about Cloak of Evasion resisting ID in the stat topic? edit: sure, ID kicks in.
Kuja gets his third turn before Simon's third and has a 3HKO. He also outslugs Asgard who has about twice as much HP but his damage fails so damn much once he's beaten up... by the time he gets his second turn he can't even finish Kuja off. Kuja vs. Ultros... I see Kuja as just able to survive one Tentacle, so he wins.
Simon beats the rest. Simon beats Ultros because even he has a 2HKO against the frail Ultros, and first strike lets him 2HKO before he is 2HKOed. He also beats Asgard because yeesh, Asgard is pretty bad. Barrier Storm goes... 43% + 34% + 26% + 17% + 8%... which doesn't kill here despite Simon 6-7HKOing Asgard. Barrier Fist will win only if it can manage at least one hit out of two, but that's more than I respect it.
Ultros is a touch faster than Asgard, 3HKOs, and doesn't fear Barrier Storm because the first shot is weakened significantly and the second weakened a lot.
Alena 3-1
Kuja 3-1
Simon 2-2
Ultros 1-3
Asgard 1-3
Presumably this translates to Asgard and Menardi down.
Precis, Adel, Dario, Billy, Milda, Nash
Nash beats everyone except Adel, who is actually quite similar to him! Fast but not very damaging... I just kneejerk her a little better, though. Her 3HKO is stronger. Everyone else gets statused except Nash who gets lightning-locked.
Billy sweeps everyone else, except Milda who OHKOs him.
Adel is fast with elemental magic, so beats Dario. Against Precis... can she survive two Barriers? Eh sure. Loses to Milda though.
Milda as mentioned beats Adel and Billy. Thinking she loses to Nash on average, although not certain. Loses to Dario. Beats Precis.
Precis walls dark? Okay, that beats Dario.
Nash 4-1
Milda 3-2
Billy 3-2
Adel 3-2
Precis 1-4
Dario 1-4
Precis and Dario gone, fairly obviously.
Mystina, Shana, Ernest, Mia, Jean, Rafa
I think I agree with Super about everything here, and I can't be bothered to analyse the pool further. Rafa > Ernest >= Jean > Shana >= Mia > Mystina, yes.