then there's another question that I've been wondering about for a long time:
if you place a stack on a map that contains several units, will the number of creatures increase in all stacks, depending on the difficulty and as new weeks pass, or only in the one that was placed initially and to which the others were added later in the properties?

ALWAYS_FIGHT doesn't look very good because no one will run away, which will be annoying when attacking weak, almost defeated units.