Depends, how much PD do you want and what bow do you want to use. Now, as an archer, you shouldnt take any athletics if you want to get kills. Instead, i guarantee much more kills with this build:
Level 30 (4 420 577 xp)
Strength: 21
Agility: 21
Hit points: 56
Unused skill points: 3
Converted: 14
Ironflesh: 0
Power Strike: 0
Shield: 0
Athletics: 0
Riding: 0
Horse Archery: 0
Power Draw: 7
Power Throw: 0
Weapon Master: 7
One Handed: 1
Two Handed: 1
Polearm: 1
Archery: 164
Crossbow: 1
Throwing: 1
No worries, PD doesnt decrease accuracy anymore. And you can put remaining 3 points into athletics or into PS (If i were you, i would take athletics)
7PD = 98% dmg increase. So if you will use Strong bow, you will have decent accuracy (not pinpoint, of course, but about... 2-3 milimeters? or 4? something like that) and pwning dmg! Or you can use longbow to defeat tincans (with worse accuracy) or you can take nomad bow for archers pwning. Really, nomad bow with 7 PD = maybe slow shots's speed, but speed rating is great and most of archers die in 1/2 (3 if very good armor, but better armor means more weight = less wpf = slower shooting = you pwn again!) shots, so...
