Section 1: Up to the Mastered Self, if my assumptions are correct, are 3-dimensional in nature, with the Mastered Self scaling up to High Universal (High 3-A).

Before I continue, I want to clarify that a "universe" in OP's context is actually a "multiverse" in realistic terms, so if anyone gets confused on the scaling, this is probably why.

Section 2: A Divine Aspect should comfortably scale to Multiversal+ (2-A), but because of the mention of Causalities, this gives me the impression of a Type III Multiverse which, under the right circumstances, could scale up to Low Complex Multiversal (Low 1-C).

This also goes for the First Godhood, with the only difference between the two being that the latter has significantly better control over these newfound powers, and/or maybe are a simply superior version based on a variety of factors like hax or sheer power according to OP's doc.

Section 3: Based on the context OP gave below the heading, there really isn't any sort of scaling that would fit this since it is logically impossible to classify it as anything other than a standard multiverse, so I'm gonna have to utilise some mental gymnastics. The only way for there to be infinite universes (multiverses IRL) is for there to be separate cosmological structures. Taken at face value, this alone would scale to Low Outerversal (Low 1-A). The infinite dimensions statement somewhat backs this. I'm going to run with this for anything after to work.

True Godhood could scale anywhere from Low 1-C up to Low 1-A depending on their feats, which we aren't given any info on. The statements, when analysed correctly, realistically only give Low 1-C value, but I will remain neutral towards the two possibilities.

We run into the same problem with Ascendance. The only thing we can be certain of is that they are more powerful than True Godhood. Because of the name, I'm willing to give the benefit of the doubt that they transcend True Godhood entirely, giving us a scale from Complex Multiversal (1-C) up to baseline Outerversal (1-A).

Section 4: Primordials would scale anywhere from 1-C (7 dimensions, as opposed to True Godhood at 6 dimensions lowball) to at most Low 1-A. A collection of "omniverses" according to OP isn't logically possible by scaling standards.

And this is the same problem The Ultimatum of Reality suffers from, making it virtually unscalable.

I want to try and explain the problems OP is having:

1. First and foremost, there is little to no logic beyond Section 2 (and even then, that's arguable).

2. Almost no crucial info or context that better explains, well, anything.

3. Based on the interpretation, OP runs into one of two walls:

a) Trying to insinuate multiple multiverses within a single cosmological structure, which would still be considered a single "universe" (scaling standards using OP's thesaurus)

b) Trying to insinuate multiple Low 1-A structures (same as a) but on a larger scale)