just send in this turn and the next, and it'll all be over.
I can personally guarantee that it won't take you much time to do
edit: Psi, I'm not sure what you mean by casting armageddons as a strat - those equally affect you; in fact, perhaps more so, as, for instance, all my mages have more hp's than your slave mages... Armageddon, in my experience, is more like a last hurrah than anything usually especially useful. Your one cast killed 25 of my "military units" - probably some human militia and LI somewhere...