I have a feeling the elemental spells might be based on the weapon you are using atm, so if you are using a wind club your elemental action will be wind based. If you are a using a weapon with no elemental affinity then you'll fire off a non-elemental attack. The same goes with the DoT attacks like Burn and such, it might be based on the elemental affinity of your weapon though I"m not sure how it would work for a non-elemental DoT lol.