http://en.wikipedia.org/wiki/Lanchester's_laws
the green archers combined have a combined attack power of 9, but how is this possible? think of it this way,
red archer damage = 1
green archers damage = 1
it would take 3 "rounds" for the red archer to kill all 3 green archers, and 3 shots would be fired,
during that same time, the green archers could shoot 9 arrows, in that same 3 rounds
what if there were 2 archers, and 3 meele units?
stay tuned untill i read that page lol