I was hoping it would become obvious who I should pick but I am still unsure...

Here is my current lineup:
Fire: Svarog AW, Mars, Acala, AW Uriel, Sonsaku, Fire Amon, YE Mammon, Dakki, Amaterasu, EoH Beelzebub and Ra
Water: Vohu Manah, Lakshmi, Water Cybele, Shiva, Ryu-Oh, Saraswati, Cthulhu, Poseidon, Celia, Water Osiris, Aphrodite, Ea, Neptune and Nike U
Wind: AW Cu hulainn, AW Odin, AW Titania, Azazel, Hastur, Set, Aether and Cybele U
Thunder: Mammon, Jupiter, Athena, TW Michael, AW Marduk, LF Aphrodite, Tye and CT Ryu-Oh
Light: Light Athena, Iris, Lugh, Shamash, Tishtrya, Frey, AW Metatron, MM Tsukuyomi, Michael AW, Sol AW, Vishnu, Eros, AW Raphael and Atum
Dark: Selene, Susanoo, Satan AW, Thanatos, Nephthys, Berith, Amon U, Osiris, Chernobog, Hades and Samael.

I was ready to throw my mtix on Iris but she came out the blue when I was rolling for Fire Frey (who never came!), now I am not sure which element I should put my mtix on? May be Thunder?