Martyr, do not try to go for high PD it might seem like a good idea but it is more frustrating than it is succesful in my opinion. Play to your strengths. An archer has a comparatively better fire rate than a crossbowman, so try to increase your fire rate not to decrease it. If you go for high PD, in the end, you might feel like a low-damage crossbowman rather than a competitive archer.
If you want to hit hard, just choose to be an arbalestier; you'll have more fun trust me.
Of course, do not get me wrong; long bow might be a good bow. I've seen people good with it. I am just trying to warn you about not going higher than 6 PD. You need to be accurate and faster to be effective, so agility is the primary weapon of an archer.