How about that the archers got really high dmg but gotta refill arrows, however the enemy army can also steal the storehouse and take the arrows for their own evil needs... That would make storehouses a vital part of any army. Of course you want an archer platoon with high dmg rather then everlasting arrows?
One day, someone showed me a glass of water that was half full. And he said, "Is it half full or half empty?" So I drank the water. No more problem. ~Alexander Jodorowsky