Am I missing something?
Is there anyone here who wants to defeat 1000 Archangels with a single Imp and do it fairly?
Even if the Imp is under the command of Sir Mullich and you have all the speed-boosting artifacts, the Imp still won't go first.
But even if (due to Tactics, for example) it goes first, it doesn't change anything. No spell can kill 1000 Archangels in just five turns. And with the speed that the Archangels possess, they will immediately reach the Imp.