There is no reason to use longbow at all, it's the worst "high end" bow that there is. Rus / horn bow is the way to go for a foot archer. Who gives a shit if you need 1-2 more arrows to kill the target, when you can hit with every arrow anyways, and shoot them fast enough so that the target doesn't have to time to take cover. Also, you gonna aim for the head most of the time anyways, wich pretty much always kills with 1 shot...