Hi guys,
I created the Hell Knight and created some behavior for him, with a variety of attack animations that allow him to be vulnerable to your weapons. I also added patrolling that can be enabled for units and I added shields to skeleton warriors to make them a bit less vulnerable.
Also the archers shoot towards your intended path when you are strafing with a bit of randomness to make it more natural.
Still a lot to do of course, let me know if something is particularly bad