Wish List: targetable spells

[Psitticine]

In a nutshell, the AI will refrain from using gems when the battle seems a lock without them. It will also temper its usage of them based on how powerful the enemy seems to it, and it seems to do a pretty good job of estimating that.

It will go ahead cast a spell you tell it to, unless that spell is utterly useless during a specific battle. It will not, for example, try the expensive Unravelling spell (banishes all magical creatures on the battlefield and can burn out mages, giving them lowered magic skills or even feeblemindedness) if there are no mages or magical beasties about, even if it had been directly ordered to do so beforehand. It will also refuse to cast such a spell if your army of 200 high-powered cavalry units is facing just one lone Vine Man; it'd be a sad waste of gems.