Crafting arrows uses the carpentry skill. At 90% carpentry you can craft superior arrows with fine cords (rock and branch don't have quality)Fine and superior arrows are more accurate than normal arrows, so it is more likely you will hit a leg or arm if you aim there. It is also easier to hit medium to small targets (fox, ermine) with those arrows.
Since they deal point damage, regular arrows are the best at piercing the layered fur clothing and lamellar armor typically worn by Njerpez warriors. As the lightest arrows, they also fly the farthest.