Again, thanks for the explanations.
Don't worry, wasn't agreeing that hardcapping magic was optimal, just that it feels very much like something you should do, not that one actually does it, because 30 karma v.s. 25 build points is ridiculous.
Blast Aura sounds like a wonderful idea, thanks. I may pick up sound aura later.
Yes, when you put it that way, mind net is a horrible spell.