Water Spells for Black Mages

[SirBrighton]

I know at least a few people have wondered why Black Mages don't have water spells when it's practically a staple in the FF universe, so why not give them it in FFXIV?
I'd like to make a few suggestions for what the Water spells could be.

Water
Acquired: Lv.7
Cast: 2.50 seconds
Potency: 100
Duration: 15 seconds
Additional Effect: Debuffs the target, making them slightly more vulnerable to Thunder spells (this could mean more damage from the initial impact and DoTs and/or guaranteed Thunder crits).

Water II
Acquired: Lv.24
Cast: 2.00 seconds
Duration: 30 seconds
Places a pool of water at target location (about the size of Ley Lines). All enemies standing in the pool of water receive damage from Thunder spells (but only the main target receives the Thunder DoT).

Water III
Acquired: Lv.48
Cast: 3.50 seconds
Potency: 240
Additional Effect: Debuffs the target, making them greatly more vulnerable to Thunder spells (this could mean more damage from the initial impact and DoTs and/or guaranteed Thunder crits).

With the addition of these spells, perhaps Thunder IV could be made into a spell that can only be cast on targets with the Water I/III debuff and while Enochian is active.

What are your guys' thoughts on this?