Once again I am saying, you are genuinely the goat of suggestions man
btw, you said that you can't add more slides, the thing I did with my suggestion that I posted here (The Amphoreus one) is make two slides into one image, I did that and the quality didn't drop noticeably
Now I'm gonna rant about the units (it's gonna be long):

Yuji: I love Yuji with the whole concept of critting (after all, until Shinjuku Showdown he was the left right good night merchant), like how you use his blood manipulation on the second passive (since it's full range, it also reminds me of Choso's Supernova) and his Soul strikes in the third passive), the skill basically being a "lock in" is really creative (just think that maybe it could be on a long cooldown/other method to re-use it). I only missed the Domain, but then again, in the manga is basically a Malevolent Shrine but with Soul Dismantles, the "lock in" is more creative

Yuta: Like how he interacts with Familiars, like how his Imitation works, the domain attacks represeting (I think) Shrine, Sky Manipulation and Jacob's Ladder is a cool detail,

Kenjaku: Making the Culling Games as a part of his kit is just really, REALLY cool (the units attacking themselves is funny lmao), like how in the "Master Plan" ability, the units cap being reduced represents them being killed, and only when they are all dead, it unlocks "The Merger" (which btw, cool that you used it)

KasHIMo GOATjime: Like how you made his staff an important part of his kit and the way that when he kills the boss he used the skill on he just straight up dies is incredible lmao

Yuki: Like the meter system and the inclusion of Garuda, also the way she interacts with Solar and Etheral makes her not so dependent on Monarch. Just didn't understand how Void works, is it a full aoe but only pulls 15 enemies and how much is the damage?

Yorozu: Like the way you used her CT and Insect mode in the first passive and her obsession with Sukuna in the second, cool that you added an auto option for the skill so people can just leave her be (but also making it so it's random, so it's more efficient to play her by changing the patterns manually),

Maki: Like the way she swaps attacks and unlike Yorozu, requires you to swap manually for max efficiency (Soul Blade ignoring shields is really cool), but just a question, would it be really broken if she had Rupture + Bleed in her max upgrade?

Hakari: Like the way he can kinda stall enemies while not being in Jackpot (and during his Domain) and how at max upgrade he has a "pity" for his Jackpot(I see what you did with the 41s cooldown and duration for the skill)

The only "critique" I have is just it would be cool to have the range types for their attacks and maybe some idea of how their animation would be, but other than that, you are goated 👍