[Truper]

There are a few spells that you learn not to use after a while, for the very reason you mention - you can't be sure whom they'll be cast upon. Aim is another that comes to mind. If mages would cast it upon themselves, it would be great, but they're more than likely going to cast it on some javalin-tossers or somebody. Blink is a spell I could think of some wonderful uses for - if I could control where the mage would blink to. As it is, I've never even tried to cast it.