What the heck? On level 4 of gaul campaign, one of my archer suddenly cloned himself. The clone was invincible, but it still did damage. I beat the game easily with that thing.
Two of my berserkers and a few archers kill trained men with shields, bows, and swords. In level 4, I send out the same thing and they're all killed by a pig. What the heck.
I wish you could organize hour units into formations e.g. make a box with defenders in the front, cavalry, healers, and legionaries in the middle, and (fire) archers and centurions in back.