I traded my Cure Potency Teiwaz to the Magian Moogle and checked the resulting trials, it eventually turns into a Surya's Staff with +17% Cure Potentcy.
So the 8 new elemental staves in the dat's are most likely 8 different elemental Teiwaz's. So I guess BLM gets to quest their 6-7 new elemental staves through Magian.
Fun times...