Upgrading group size
Am I understanding correctly that upgrading a unit by one figure always cost a flat 50 gildar? It seems very strange that units that require resources wouldn't have a resource cost for this. And for very expensive units, I think you could possibly end up with a better value by building a smaller group and upgrading it than rush building a larger group. It's a single player game, and I think I'll choose not to use these exploits on purpose (i.e. always build the largest size group I have access to at the time), but it still seems wrong.