Is There a Reason Why Conjruers and White Mages Don't Use Water Spells?

[Heroman3003]

I know Aquaveil exists, I'm just wondering whey there aren't more water spells given its destructive and defensive potential and the fact that an entire section of the CNJ questline is spent discussing the power of water.

There is no lore reason. Most elemental spells were just phased out over time in favour of more generic holy-esque ones. It's not some lore changes or anything, just a little bit of disconnect between game mechanics and lore.