1) In a lieutenant encounter, if the overlord has monster treachery, can he use treachery cards to spawn monsters that are NOT listed as that lieutenant's minions on his card? E. g. can Sir Alric Farrow reinforce Skeletons through a treachery spawn card?
2) Can the heroes prevent reinforced monsters from coming onto the board by placing two heroes right next to the exit piece from which the monsters would enter?
3) Can the overlord prevent the heroes from fleeing by "blocking" all the exits with reinforcements (say, two Beastmen per exit) that he does NOT move onto the board?