[Morwen]

I disagree. I do not think they would be viable at all.

Fire is one of the elements that is most strongly resisted by monsters, followed by cold.

You would also be destroying the ability of any resist mages to do their jobs properly. They would NEVER be able to resist anyone thanks to the heavy negative in echantment and the inability to adequately resist the two most common elemental attacks. Healing would also be out of the question.

And WHY is it silly to be casting fire and water spells together? Heck, there's a spell that uses both elements!