Not sure if I am supposed to post this here.
I just feel like this kind of spell(and any other spells that do something like a confusion effect) are simply not as good as they should be because they make enemies literally friendlies during the duration of the spell. If you cast heal, you heal them. If you cast a "Enemy Only" spell, it doesn't affect them. Not sure if this was intended.
A very small gripe. However, it was one of my favorite spells in BG.