Well this probably isn't a major problem but the source of your woes from long past is that any spell with <ai hint="mine"/> will never be cast ever. For instance if you gave diggle a spell with the hint of mine that lays eggs it would never be cast. It'd be nice if this was somehow implemented, even placing it in between the caster and player would be useful. For instance unliving wall could get it so that it works nicely.
Oh, is that the problem? Man. I guess I should replace those with <ai hint="target" /> until this is fixed.
