I’m a level 32 ranger and run a short bow + a long bow. The short bow does much better with damage than the long bow. I have found the long bow is effective for knockbacks and the AOE ability but that is about it. With the long bow using something like bleed makes it a little better.
Vitality will help your increase your HP but power does increase your attack and precision will increase your crit.
My opinion would be to use a short bow or go with a axe or something as primary and switch to long bow when needed. I have noticed it is difficult to use the long bow as the primary especially when soloing.