Abstain on Souji
Mad Swordskillz
Agrias, Meliadoul, Beowulf (FFT) vs. Zeno (BoF5), Ull (VP2), Cloud (FF7): Swordskillz aren't wonderful against bosses they don't spoil, Ull+Zeno are both pretty strong and should gun them down. The FFTers can absorb holy to spoil Ull's damage, but that lowers their HP, and Ull can't ever be counted out due to Heal.
Agrias, Meliadoul, Beowulf (FFT) vs. Bat (DDS), Rydia (FF4), Hawk (SD3): Beowulf has a way to kill Bat! Two, actually (Drain and Shock). But... he's also slow, I have to think that a combination of Hawk and Bat offence can kill him before he gets a turn even if he blocks transformation. And if he blocks transformation then surely Rydia outspeeds him; she may anyway...
Agrias, Meliadoul, Beowulf (FFT) vs. Rosa (FF4), Kary (FF1), Charizard (Pkmn), Zoah (CC): Flame Shield + Earth Clothes + FFT shields and such really slows down a lot of the offence here. I think they can manage.
Valentine Family Reunion aka: Team of 'No Vincents'
Keith Valentine, Joachim Valentine, Hilda Valentine vs. Zeno (BoF5), Ull (VP2), Cloud (FF7): No holy resistance here, so yeah the bosses run down Hilda and certainly aren't scared of her brothers.
Keith Valentine, Joachim Valentine, Hilda Valentine vs. Bat (DDS), Rydia (FF4), Hawk (SD3): Silence blocking deals with Hawk, instant death can do its thing from there, and yeah, earth mangles Batstrats.
Keith Valentine, Joachim Valentine, Hilda Valentine vs. Rosa (FF4), Kary (FF1), Charizard (Pkmn), Zoah (CC): Paralysis blockers are needed again... ID can take out Rosa + Zoah, I would think? That said Charizard + Kary take out one of the accurate IDers (Keith maybe) before he gets a turn, so Zoah gets to live, does a bunch of damage... yeah I think Kary's team has the edge.
"Who are these People?"
Performer, Knight, Red Mage (BD) vs. Zeno (BoF5), Ull (VP2), Cloud (FF7): Knight physical immunity is a problem for this team, but they can shred the other two pretty fast. And while Ull does reduced damage to Knight, he can damage Knight, and Knight really REALLY isn't equipped to gun down multiple bosses in one fight.
Performer, Knight, Red Mage (BD) vs. Bat (DDS), Rydia (FF4), Hawk (SD3): Hmm yeah Bat is too big an issue here. If only Knight was faster!
Performer, Knight, Red Mage (BD) vs. Rosa (FF4), Kary (FF1), Charizard (Pkmn), Zoah (CC): Charizard probably ties Knight up in firespins or something, while Kary wrecks RM.
Swordskillz 1-2
Valentines 1-2
Bravely Default 0-3
Tiebreaker:
Jowy, Geno, Lyon (S5) vs Lassic, Marcello, Jenova: This is definitely the toughest fight of the bunch to me.
Lyon: fire immune, but will die in two Lashiec spells. 90% MT off above average speed.
Geno: Goes first, then average. Geno Boost is godlike. Averagish otherwise, though has MT magic at least.
Jowy: Low OHKO off good speed, relatively averagish past that. Sadly, one of the few S2 PCs who can't null dark due to fixed equips.
Lashiec: Somewhere between 3-4PCHP, 80% speed or so, 75% MT dark magic.
Jenova: Probably like 1.5 PCHP but better than halves magic, so over 3 durability there. Entirely fire. Super fast (160-160%). 56% ST fire, becomes 84% below 1/4 health. Also has 60% silence.
Marcello: It doesn't matter, above average speed but less so than the enemy team, isn't getting a turn.
If you see silence as turn 1 (I don't), then Jenova can make a real mess of Jowy here. (The other two can block it to some extent.) Lyon... may not want to resist it, it probably makes her either go after Marcello, or not null fire. I dunno.
Regardless, let's say Geno Boost hits... Jowy first, why not, else he dies real fast after his first turn. Jowy + Lyon then kill Marcello and take over half the HP of the other two. Lashiec AnotherGates, Jenova will use one of her turns to ensure Geno dies, and the other... either hurt Jowy or try to silence someone. Not sure which. If she 3-2's Lyon, she may reliably silence her... but I imagine she falls just short unless Lyon is going for status resistance.
I don't see anything the team can do to keep Jowy from getting a second turn, except maybe if Jenova tries to tag him with silence twice. But then Geno gets another turn, boosts Lyon, and we get a boosted Vermillion Sky on order turn 2. But... if both bosses survive that, they then promptly kill both Lyon and Geno at least, and Jowy... may well follow before his third turn. However, adding up a boosted Hungry Friend, a boosted VS, and an unboosted VS... that's like 3.9 PCHP, that's too much.