ok this question is not so simple for me. what is the formula for avarage damage done by a bow? Assume I will be STR level 16 (spent a few points on INT around level

with the level 2 basic bow skills at mastery 7 for a 9 gap. I already know to get a full set of garment all maxing +MP to help my STR character. The reason I need to know how to compute the damage done by a bow is I want to be able to know exactly if the bow I am looking for is going to do the job. If my character is going to require a SOx bow to two shot bandit archers, I need to know now since it will take me a while to get the money and find a good price on a pimper upper. Also if I can get the job done with a totally maxed out non SOx weapon then I need to know exactly what stats I am looking for. So I assume I should take the HP of a bandit archer and look for a bow that can do that much on average for one shots or half that for two shot kills. PLease help me with the math, ima noob but learning fast!
Thanks!