Is it useful to cast Storm when you have dominant battle magic?

[Epaminondas]

I have been playing this game on and off since it came out, and only now I realized that Storm actually reduces my Precision! LOL.

Anyways, so what's the use for Precision if you have strong battle magic at the mid- or end-game juncture? I suppose it stops flyers but is it worth the greatly reduced accuracy when you cast offensive spells? It almost seems like Storm is more useful when you have a strong melee army but weak battle magic.