This is by no means perfect. There are sixteen seconds of lazy time in the town center in the Dark age. However, this is not to show an ideal buildup, it is to show that 19 villagers in the dark age is possible with men at arms coming in the Feudal. It can be improved upon, with practice, and could become a viable strategy, with better management all around. I have used a similar (20 population dark age) buildup once in a multiplayer game, which I won. However, this may be weak to well-executed dark rushes.