By the end of a game I usually many units with 2 - 4 promotions and 1 - 2 units with 5 - 6 promotions. I almost never gain promotions beyond that. I almost never build barracks line of building. As I said above I use the double promotion to farm ep from cities. Often prolonging a way beyond the point I could or would want to take another city. So let me ask you guys another question. What is the best way to farm ep in this game?