Personally I am thinking for the Pillars: 1-C, possibly 1-A. Bare minimum Low 2-C.
I have them at 1-A, and I can't see any way they could be below 1-C, considering full Pillars and Great Old Ones should have merged with their Sefirot.
The other Above The Sequence are definitely not Pillar level so I wouldn’t give them 1-A imo as I doubt they’d be able to affect the entire Astral World. So just 1-C. (As you said this position should be clearer when we get more info regarding High-Dimensional Overseer and the like). And obviously Solar System minimum, at least in terms of DC.
Most of the Great Old Ones should be merged with their own Sefirots, which I believe should scale to at least 1-C, assuming they are equivalent to Sefirah Castle. As for hax, I would comfortably place them all at 1-A, considering
they represent aspects of the universe and govern universal independent concepts like concepts of space and time. Additionally, you might scale them based on feats like Adam's ability to illuminate the entire Astral World.
Sequence 0’s are a bit iffy because they are definitely weaker. MTOD would’ve been able to kill Klein inside of Sefirah Castle if he divined her, while Eternal Blazing Sun only damaged him. So 1-C is up for debate. But they should at least scale to Ankewelt, so Low 1-C/Low 2-C is good. And minimum I’d put Planetary, going about with Sequence 0: Tyrant’s
description (Also anyone in this level and above should scale to Speed of Light minimum). You can argue Star level because of Klein but even then it was stated that The Fool is a glass canon among Sequence 0’s.
Being able to affect Sefirah Castle to that extent should automatically qualify all Sequence 0s as 1-C. The Eternal Blazing Sun was able to shake Sefirah Castle, a 6D infinite realm.
Angels should at least be scaling to Sequence 2 Klein who wished a town into existence. I wouldn’t give them any sort of Astral World scaling as even KoKoA Klein was only able to graft a bit of it.
I believe the hax of all Angels and higher should at least scale to the Astral World (which I consider 1-A), as they can influence the Astral World and shatter Beyonder characteristics, which are projections of the Astral World and parts of the Original Creator. AP and Durability wise you can debate them a lot lower.
And Planeswalkers can only really use it to travel and nothing else. Also I obviously wouldn’t give them any sort of Sefirah Castle scaling as even KoA Amon could only access it by cheating Klein in the real world. Klein was immune to Quill of Alzuhod’s/0-08 (Sequence 1) effects while in Sefirah Castle and so on. They also shouldn’t scale to Ankewelt’s creation feat. Also their Mythical Creature forms are directly stated to not be observable not due to quantitative values like dimensions and instead more abstract ones, so they wouldn’t fit for 4D. Maybe there’s a feat I’m missing that gives them higher dimensionality but I can’t recall it.
I don't view mythical creature forms as physically higher-dimensional, but I can see them as metaphysically higher. In LOTM,
the higher you ascend in dimensionality or layers, the more abstract you become. Since mythical creature forms can't be described through dimensions and possess abstract qualities (which I believe represent higher dimensionality in LOTM), we could consider them metaphysically higher beings. However, I'm uncertain if this qualifies them for a specific tier in the system.
By the way, I'm curious about where you scale the hax for each sequence. From my understanding, the vast majority of LOTM characters should qualify for higher-dimensional / layer smurf hax.
And minimum I’d put Planetary, going about with Sequence 0: Tyrant’s
description (Also anyone in this level and above should scale to Speed of Light minimum). You can argue Star level because of Klein but even then it was stated that The Fool is a glass canon among Sequence 0’s.
I believe that even Demi-gods should have FTL combat and reaction speed, as referenced at the bottom of the cosmology blog. Some argue that Tyrant's ability to transform into light or lightning indicates that only Sequence 0 and higher can achieve the speed of light. However, I strongly disagree. This ability seems more focused on matter transformation/matter manipulation than actual speed, especially considering the significant difference in speed between lightning and light.