[Huzurdaddi]

Wrathful skies makes armies a waste of resources very early in the game. Many find that this "ruins" the game since so many unit types become irrelevant so quickly.

I personally find that a nice A7 casting requierment ( and a similar bump to all battlefield spells ) works quite nicely. It still possible to cast the spell, but it is very expensive to get a caster than can do it.