I don’t know about you, but I find it pointless to build anything else except feudal knits, dismounted feudal knits, armored sergeants and x- bows. O and gunpowder units. All the others are just not worth the money and the waiting. Imperial knits are weaker than feudal ones (I have tested it personally) and this must be some kind of bug. Any way I can handle the game with fortress troops only, just until the gunpowder comes.