So put simply this is how Timelines work according to the Vere;
N = Infinite Possibilities, each Possibility = 1 New Timeline
1 Variable/Action = N
2 Variables/Actions = When two variables exist they superimpose each other, and become N^N, so Infinite Possibilities to the power Infinite Possibilities.
Infinite Variables = (N^N^N---> Infinitely)
Infinite Variables Superimposing = (N^N^N---> Infinitely)^(N^N^N---> Infinitely) and then all those Timelines created through this method do the same constantly becoming bigger (N^N^N---> Infinitely)^(N^N^N---> Infinitely)^(N^N^N---> Infinitely)---> Infinitely, and so on and so forth.
This is what
Low 1-C equals in our Tiering System;
In terms of "dimensional" scale, this can be equated to 5 and 6-dimensional real coordinate spaces (R ^ 5 to R ^ 6)
Aleph-1 (An uncountably infinite number, assumed to be the cardinality of the real numbers themselves)
R is Real Numbers, Uncountable Infinity, and Aleph-1, so an Aleph-1 of Universes is Low 1-C, and 2 Variables are equivalent to N^N which equals R (Infinity ^ Infinity = Uncountable Infinity or Aleph-1).
Characters or objects that can affect structures with a number of dimensions equal to the cardinal aleph-2, which in practical terms also equals a level that completely exceeds Low 1-A structures to the same degree that they exceed High 1-B and below.
So this goes from Aleph-1 Timelines to Aleph-2, and then Aleph-3, as each Aleph can be reached the same way Low 1-A is reached from High 1-B. So once there are a High 1-B amount of Timelines, it's then High 1-B^High 1-B, then Low 1-A^Low 1-A ---> on until you hit 1-A+ and the Uncountably 1-A+.
Of course, this never hits High 1-A since HIgh 1-A is Inaccessible to this, just like the Outer Gods are. The only reason it's a likely rating is that they don't directly mention it's power setting like before, but they are described similarly and was likely the same in that regard.