[Arcturas]

I usually find Storm advantageous to Vanheim, though having storm power and a sabbath would further cut down the fatigue costs of the air spells. Does storm affect ranged spell precision, or just missile weapons? If it does, then I can see how that would be a problem. Otherwise, it mostly keeps fire off your glamoured troops.

If you've got a supporting contingent of devils from soul contracts, on the other hand, I can see how that would be a problem.