Well, he's already treated as being unquantifiably above the cosmology mentioned in the verse. And the question in the OP doesn't actually add anything to the cosmology from what I see, it just asks if Yogiri is conceptually superior to the dimensionality in the series, to which we aren't give a "yes" or "no" answer. Honestly, his response to the question doesn't even really make sense if you ask me. Like, literally it doesn't even seem like a proper answer to the question. For that reason alone I don't even like using it as evidence for anything, but anyway...
At the end of the day, I don't see any evidence of him being conceptually superior to dimensionality, and thus I don't understand the 1-A rating. The author never directly confirms that notion.
Except this also requires a direct statement of the character in question being superior to the notion/concept of dimensionality, which Yogiri doesn't have from what I've seen.