Scripts

If you use MoveHeroRealTime, that should be enough for attacking, but RealTime is RealTime, it will happen directly at any moment, possibly during the player's turn, and there will be no way to escape.
Regular MoveHero might require StartCombat, yes. Although I'm not sure, but it seemed to me that I encountered something like that.
Attractors don't work. If the behavior of your heroes is not rigidly defined and you need them to target something, even if only sometimes and imprecisely, an attractor might work, but it shouldn't be used for a rigid target. And even if it works normally for the mapmaker, there will most likely still be players for whom it won't work.