[Taqwus]

Sorcery would be nice, but less thematic than fire/earth-- and it's easier to open up other magical paths or grow significantly in magical power with sorcery than with elemental magics. Spectres, Acashic Record, Lamia Queens, Skull Mentors forged at 50% off via dwarven hammers, early probing via Dark Knowledge and Astral Probing... perhaps *too* nice for a magic-averse nation.

Hm. Even smiths + hammers + water magic might be problematic for the efficient and athematic clam hoarding.

Supply / siege / conventional combat might make more sense. They won't necessarily need a magical boost if their military machine makes up for it, or if drain scale had more impact on casting fatigue (perhaps even affecting ritual cost?) and so forth.