Grand Guignol (SL1 Difficulty 19 Final Boss Fight) - Black Souls 2

Thumbail Source: pixiv.net/artworks/118292025
Now in higher quality video! I had low quality before because I forgot to change my OBS settings.
As always, no Chaos Dungeon stuff, as few Cycles as possible, and no Watches (though Spiritual Unity is honestly just as broken as them).
Before anyone asks, this fight is NOT possible solo SL1 without Chaos Dungeon spells, perfect Guardian Angel luck, and PWP spamming Voice 2 for perfect magic reflects. To see how that would look, check out Ilia's SL1 D9 Fragile Ring run, as he takes on GG solo at the very end (though technically the Fragile Ring run's solo GG fight is harder and longer than the SL1 D19 run's since you have way less AGI, but the strategy would be the exact same). No it's totally possible, I was just stupid.
The strategy for the not solo fight is actually rather interesting. It mostly comes down to "I spam %-based damage and keep everyone buffed while the trio clean house and handle the brunt of the attacks", but phase 3 and 4 have a notable deviation.
To keep a rather tangent-y subject short, RPG Maker natively cannot apply states to actors (you and allies) that are incapacitated (dead), so when the script that handles the cycling/increasing domain states of phases 2, 3, and 4 try to apply a new state, they are unable to actually apply the state, and so the incapacitated actor effectively loses the domain nerf.
Basically, I can get rid of the phase 3 domain for myself by purposefully getting countered by not-Unis (strangely, Guardian Angel will not revive you if you die via counterattack), and completely nullify the phase 4 domain for everyone by letting them die in phase 3. This strategy ONLY works because I have Gerda who knows Raise II, so she can revive me.
After that it's pretty smooth sailing, but the game absolutely tried to ruin the attempt at the last possible moment.
Further commentary about the mod:
The player character is still capped at the same amount of stats as vanilla BS2, despite everyone else (allies and enemies alike) being free to be as high as they want. Not that I think anyone would legitimately grind Outer One souls for days straight if I did let the player have the big stats.
You may have noticed Carnacki, Florence, and Gerda (whenever Carnacki used Ghost-Finder's Command) didn't display their Max HP in battle. That's because trying to get the display to look good with more than 7 digits was a fruitless endeavor, so I simply made it display only the current HP past 8 digits.
There are only a few fights that are strictly impossible without Chaos Dungeon spells. That being Lingeriena (because she has 100% HP Regen), Unis (because she's a bitch), and Difficulty 19 Mabel (because her fatass doesn't take %-based damage). Unfortunately, these fights aren't very interesting. I added an option to challenge the entire Ashes Reignited gauntlet at Difficulty 19, and I have yet to complete that, but it should be possible without Chaos Dungeon stuff up to Mabel (She's beaten by Crit Oiled Chaos Blast, I'm sorry, there's literally no other option).
LUK is the only stat whose cap I didn't increase (because I hate Unis), but it never really mattered because only DLC3 enemies would get LUK too high to properly combat.
Once I finish making final tweaks, I'll pin a comment with a download link, though it's not that big of an edit all things considered.