I stronger disagree on melee units promotions. I never try to get march or such, the most important promotion on them is cover. Cover let them to survive after they attack, meaning they can pillage next turn and attack again. They never had health to do 2 attack/turn. Same try about armored units, but they do not have cover, so for them i try to get march. One attack and run why pillaging is strategy for armored units.