Remember though that thus far it seems that the "traditional" associations with the gods (Mercury - speed and Mars - war, etc.) do not seem to have held up thus far. Afaict the magaka only borrowed the names without bringing over much that "matches up" - as if to deliberately make it harder on the reader in the guessing game!
I still think that Ayumi has Mercury though, since I have been utterly "taken in" by the parallel, knowing full well I could be totally and utterly wrong.