As a default, statements of being "above dimensions" are set at Low 1-A, and the same is applied to statements indicating superiority over "All of space and time," and similar.
However, if they are applied to realms that can be inferred to surpass the very composition of the lower reality (e.g. Realms that are, themselves, non-composite, such as conceptual domains, or often,
voids of nothingness), then
1-A is the most appropriate rating for them.
Furthermore, keep in mind that Type 2 Beyond-Dimensional Existence (In particular the latter variant) is not simply a combination of a non-dimensional state of existence and greater
raw power than all dimensional structures in a cosmology – Though that is a necessary condition to qualify for it, it is not a sufficient one. Instead, the non-dimensional state of existence must be the direct cause of the character/realm's superiority over dimensions. A simple example being
voids of nothingness that lack space, time and physicality entirely, but are nonetheless "vaster" than physical reality in some way, with
common imagery being the universe as a small object encompassed in such a backdrop.