Assuming everything you're saying is true, the actual scaling chain would look something like this.
Speed: At least
Massively Hypersonic+,
Sub-Relativistic with V1,
higher with V2,
Relativistic+ with Top Speeds [Insert explanation about Ay's/Bee's top speeds, mention amps which increase this level of speed].
Anything else would look visually horrible since you'd be reference multiple transformations, and abilities, multiple times over, it would be needlessly long, needlessly confusing and just plain ******* ugly.