Heavy/Godlike: Rashidi, Lamington, Raquel, Tidus, Naoto, Fei
Rashidi > Raquel > Naoto > Tidus > Fei.
Rashidi just sorta bumrushes the whole pool. Raquel immunes ID and cleaves Naoto in half, somehow manages to spoil Tidus' spoiling game (Tidus dies to a counter, and Poison Bite makes his turnhax eat his ass off) and walls Fei's physical damage. Naoto IDs Tidus of the godly MDef/death resistance and not good enough to get past Miori Shirt accuracy (for added insult to injury, he can't one turn her with a single salvo of Sonic Steel QHs either) and insultingly gets a second win in a freaking Heavy/Godlike pool, because spoiling Fei wasn't ridiculous enough. Tidus spoils Fei too, who probably fails to upgrade. That's just funny.
Middle/Heavy: Richard, Bowie, Yulie, Demi, Kanji, Yukiko
Demi > Richard > Yulie > Yukiko > Kanji > Bowie as a kneejerk. Small detours, though, as Yulie > Demi and Kanji > Richard.
This is pretty clear-cut. Demi nearly solos this whole pool with ease: Kanji can't OHKO Demi with anything and is far slower, Richard Swallow crit overkill hype can go die and Demi may be faster and mocks the evade, Yukiko just gets 2HKOed, can't dodge and Demi quite possibly has more resources than her anyway while definitely having more stats. Agidyne is a borderline 4HKO against Demi -before- Barrier due to the elemental resistance to boot, so Yukiko's just hopelessly grasping for straws trying to stay alive. If Carlie couldn't do it, Yukiko can't either. Bowie just sorta sucks: Demi Barriers and his OPB Bolt 4 is now no threat, and she just outheals him too easily. Yulie, however, outstalls Demi because that's what she does (Sleep immunity clinches it nicely).
Rest of the pool is academic enough: regarding Richard, Swallow Rune is enough to OHKO Yulie of the 65% PC HP on pdur, he resists Yukiko's status by enough to make it useless, immunes her actual damage and just heal-locks with a physical after Miori runs out and Bowie just isn't a Heavy. Kanji, however, puts that crazy durability to use, as he 2HKOs Richard, isn't 3-2'd nor 2HKOed and bypasses the parry rate because S5 parry sucks against anything that isn't a basic melee physical. Yulie outstalls Yukiko with a vengeance, does the same to Bowie, and isn't OHKOed by Kanji after Protect and goes first, and Quick should let her gnaw at him down to no Primal Force range fast enough before crit hype kicks in, and turns where he's using his physical are turns Yulie usually isn't being pressured enough - not to mention that him using Primal Force even once in the middle of the match is costly for him here. Kanji has issues against healers he can't OHKO. Yukiko herself manages Kanji, and mocks the hell out of Bowie with Lightning resistance, better speed first turn (...), magical damage and tons of healing. Kanji handles Bowie as well (Lightning immunity is just particularly insulting, not that it -mattered- given the durability), and Bowie just hauls his sorry ass to Middle.
Light/Middle: Kain, Aigis, Amarant, Tio, Landis, Serph
Okay, this is a disaster. First, I'm assuming Wing Edges are reasonably storebought.
For the easy part: Aigis solos this pool with unwavering fury. Nobody hits her weakness and the entire pool weeps bitter tears against Orgia Mode. Aigis is sort of a Heavy when she's not getting spoiled, and tossing her against a bunch of unimpressive Middles and actual Lights without thunder damage is roadkill.
Besides that, Amarant more or less solos this pool outside Aigis because it freaking sucks. His 40% healing owns Tio (...) and, if Wing Edges are viable, he just 2HKOs her and avoids any arguments neatly. Serph gets elementally walled because FF9. Landis also gets 2HKOed, and is slower. Kain just fucking fails and, even if he didn't get elementally walled, Amarant would outslug him in his sleep. Heck, CHAKRA just mocks him even further.
Landis beats Serph and Kain. Tio should actually beat him, though. faster, 3HKOs, and while Landis 3HKOs back, that pathetic "evasion" game might actually pan out here, since two stackings of Whisper to the Stars, she probably has enough evade/defense to avoid even a 4HKO and enough punch to 4HKO, not to mention she's now a lot faster.
Tio also beats Kain of the mighty 4HKO and nothing else in Middle, gets handled by Serph, who doesn't give a fuck about her buffing game. Kain, however, gets a free win against Serph because DDS weaknesses fucking fail. Fuck you, Serph.
The Heavy/Godlike and Light/Middle pools redefine trainwreck.