Here is a video of the angle of attack required to get past a down shielding knight. The archer has to jump and fire at the zenith to get past his shield on level ground. (I was one block higher in the video) I personally feel like this is unfair. I would be okay with it if the shield bump did not stun. The way it is a knight can do shield bump stun archer and then stab spam or get a slash off before an archer can get away or charge a shot. This basically allows him to attack and defend at the same time.