[Vynd]

I think that there are a lot of spells for which there is no resistance. Armor helps against Blade Wind, but a resistance? What would it be? There's no Earth Resistance. Frankly it had never even occurred to me to ask if there was a way to resist that spell.

But you have a good point when it comes to spells like Magma Bolts and Geyser that one could logically consider to be fire/heat damage. We know there's a resistance for fire, after all. So it's just a question of whether or not it works on those spells.