Hit-and-run tactics, in their classic form, are of course prohibited. In this case, I meant the standard example of a hit-and-run before a final battle, when a well-developed mage first attacks with fast, fire-immune units (usually single units) and casts Armageddon. If there is an opportunity to retreat in the second round, he casts it again and retreats; if not, he simply dies (even if he gives the opponent some artifacts). After that, the main hero attacks and finishes off the remaining enemies.