I don’t think any of the promise members are actually that op except kronii, besides the fact that they’re concepts and probably can’t die
Fauna can presumably control nature, though I don’t know if that’s even confirmed she might just have the healing magic and affinity with nature and preside over it. But calling that stupid op is like calling aquaman op.
Bae is just chaos, which, we don’t really know how that materializes, and is inherently gonna be impossible to define anyways
Mumei can turn into an owl and has a knife. If we go by the hologra she can exist in a sort of time loop if civilization fails, or something like that, but I don’t think that’s a reliable source. Either way that’s not an offensive ability. Maybe her connection to humanity through civilization would let her control humanity and raise armies or something? Idk
Irys is hope, which again is unclear how that would actually manifest. Maybe she has some angel and demon powers but if she does I don’t know what they are
Even kronii is just better time control than ame, it’s possible she’d be able to manipulate timelines through non-conventional means but that is unclear
All in all not actually that much more op than myth
Sana was the real heavy hitter, being space would imply some sort of spacial manipulation, and even if not, she seems to be tied to celestial objects and can turn giant so she could probably beat most things
