If what you first said is an ontological superiority, then yes, it's Low 1-C, but otherwise it depends on the context. I mean, it could still be a 4-D character above 2-A, like I said, it depends on the context.
I don't quite understand your second point, but you're talking about a character who is "transcendent of the whole concept of space-time and cardinality".
If we assume that... I think what we are talking about as this "concept of cardinality" would extend up to( (At least I think it will cover Alephs without context) 1-A and 1-A+ and transcending that would be H1-A.
But still wait for answers from the Tier 1 expert.