Gosh that's a fun one honestly
Cos like, all of them are technically the same power level with minor personality tweaks that make them more or less likely to outwardly use that power but like, I think ones like Sheep Maddie (whom I desperately need to design properly) that lean WAY further into utilizing their full magic potential would be conceptually more powerful. Even just dragon Maddie by sheer incidental chaotic vibes LMAO.

I did have a form planned at one point that was like "What if I gave Maddie a beast-like deity form" which would probably be the most powerful one aside from that I guess?