Alright, this is gonna sound weird, but bear with me for a bit.

What if there was an Alchemy Machine that operated on the opposite manner on which the current ones do?
Surely, there would be many implications items, stars and UVs, but there's a very important reason I'm suggesting this. It would fix the radiant drought!

See, right now, we can craft 5 fire crystals of a star level for the price of 3 fire crystals of one star level higher and a few crowns. What if we could craft 3 fire crystals of a star level, for the price of 5 fire crystals of one star level lower and a few crowns?

If we take in consideration that playing through FSC right now wields you 0-9 Radiants and 30+ Shinings, implementing this Reverse Alchemy (even if only for fire crystals) is a valid, easy way to fix the Radiant Drought.