I think the most advantageous is taking defensive position and letting – or forcing – enemy to come to you. Because archers. Without them on your side and with more powerful ranged enemies it would be the other way around. So far only skeleton archers can be trouble if they are well protected (although crossbows deal nice damage to them), but they have hard time getting through your armor. What about skeleton crossbowmen? This should make players think twice about disregarding ranged defense and remaining on the defensive side of the battle. Orcs can be somewhat OK without ranged due to their heavy armor, shields and ability to wedge into your formation and wreck havoc with massive damage.