I only use archers, and when they get to the statues, it takes forever (10 minutes and going: so far 30% down) to take the statue down with arrows. The enemy does nothing but sits there in garrison mode. This is just stupid. If you meant to penalize players only using archers by reducing the damage done to statues by arrows, you didn't do so difficulty-wise but time-wise.
difficulty needs to be adjusted. Turn based game should penalize players who don't plan their strategy before action. This one was just so easy that no thinking was necessary.