[thejeff]

Granted, but you can't kill chaff with lightning. Or, at least, you can't kill enough of them. 50 fatigue from a 3A mage for 3 targets? It's hard to get enough 3A mages to kill even a few hundred troops that way.

Wrathful Skies or Shimmering Fields work, but need high end Air mages.
Wrathful Skies needs a Storm and either a SC caster (preferably AQ) or a willingness to sacrifice your own chaff to give it time to work, which isn't very useful in a war of attrition.

I was just playing Man fighting off Ermor's hordes of Long dead horse and I was desperate for anything that could actually do area damage.