For now...this is by design (you could argue, by bad design). The problem is that the offensive flags (in this case what allows him to zap) added to a mob are checked in one spot, and the prog (which allows him to use invoker spells) is checked in an entirely different spot, so it is possible to have both fire in a round. Eventually I'll probably get around to fixing this (there are a bunch of things that would need to get upgraded), but for now it is chalked up to mobs can do this, players can't.

So long, and thanks for all the fish!