Well, Amaterasu isn’t just the sun goddess, she’s the sun itself (and in later myths, the universe itself). So I think she would win against a douche like Zeus. And the universe pretty much only exists because Adi Parashakti allows it to. That sort of trumps everything.
So Zeus calls in his dad Cronus who is also the sun and Cronus smacks Amaterasu around and wins because she is more interested in having relations with a local noble than fighting. Meantime Ocean, Cronus’s wife takes on Adi, who has no form anyway and the mighty Greeks win again. To commerate this victory the Greeks get to name the constellations. Western gods triumph over the eastern gods in a two fall match as the pantheon goes wild!