Materia maker just made me think a bit. We already have the lore around aether trough Moenbryda. So how about an "Aether chaneller"? Depending on area and strength of the gatherspot it could give different materia. Maybe it could be even a minigame like crafting which desides the outcome of materia. As this could have a heavy inflict in materia prices, there could also be the possibility for "clear demimateria" like items. So just gil.

I think that could be a fun class if done right.
As a bonus it wouldn't mess with all the recipes for the DoH