remember, ur str only needs to be level +5
it would be best if you max out bow mastery first, because it increases ur damage by a lot, dont worry bout booster till the 40s
this is the point distribution by level 70
1) mastery <-during the process of maxing, u might want soul arrow and booster
2) bomb (max)
3) final atk (max)
4) bow booster (11)
5) soul arrow (10)
6) power knock back (max)