Water Savant doesn't even have any water spells, it's all Ice.
So instead of renaming it to Ice Savant, why not add a water spell?
My idea was something like the "Gust of Wind" spell, but only a wave that washes things away and knocks people down.
It could also put out Fire Elementals and immobilize Warforged due to rust, or something. (Reflex save?)
Some of these ideas may not be the best for the spell, but the primary idea of this thread is "More Water Spell Plz"!