[QUOTE=Mr White;2757571]
2) The attack/raid had to be done fast to avoid getting drown in to a prolongued fight the dwagons couldn't win without casaulties. This means that some siege units were probably left alone as the risk of being overwhelmed by units that come to help would be to big. (this argument may be untrue if a selective attack means that only the attacked unit/stack can defend itself which I doubt as archers were shown firing on the dwagons. Besides, what's the logic about aircover if it can be avoided so easily.)
QUOTE]
Well, if the same "8 per stack" rule holds for them, 1 Siege Tower, 2 Pushing Heavy Bears, and 5 units of Marbits/Archerbits, whatever = better than 50% surviving any selective attack, so it's a "Win" for every toasted tower.
Maybe ONLY the Marbits in the stack attacked can attack, the others can't unless you are dumb enough to end your turn next to them. (Sort of a Noob mistake...)