The setup for econ21 is, frankly, really bad. Because the solitary Turkomen unit is the main army, he won't get to deploy on the battlefield. Unless he is ridiculously lucky and the southeast corner of the map is a defensive hill, he's going to have to rush his men all over the place just to get into a defense. By the time they get there, they'll be tired and probably will have very little rest before they are assaulted. The HRE army is also much weaker than it looks. The peaseant crossbowmen, pilgrims, and peasant archers will be of relatively little value in the fighting, and just those five units account for over 30% of his entire manpower. The Turkomen will be of relatively little use in a melee as well, meaning that 40% of all his men will be useless when the lines converge.

The more I look at it, the less I like it. It's a bad, bad situation.