ok after carefully thinking about it i have decide not to go on the classic elements but on the japanese model

of Chi, Ka, Fū, Sui and Kū or if you like Earth fire wind/air water and sky/heaven

so will need 5 goddesses

so far i have:

Earth(Chi) is Emerald
Fire(Ka) - empty
wind/air(Fū) - empty
Water(Sui) is Omega
Sky/heaven(Kū) is Velvetkittie

so need ideas for two more