21/18
7 PS
6 ath
3 WM
Put rest in IF and shield.
I wouldn't have 3WM as a starter. You cannot hit anyone with that. I use the same build currently with 6 WM and I put all the rest to IF (70 hitpoints). This way you can stay a little more alive and take a few more shots.
One last thing: shield for archer is not a good choice. Shields are heavy they will make you slower. As an archer you should keep your weight at minimum so that you'll have more mobility.