This is one i'm not sure about i'm taking my best bet on this * i'm using hidden-street for skill names Lolz*
Level 30 Iron arrow
Level 31-32 Mastery and 1 booster
Level 33-34 Booster till 5 rest on soul arrow
Lvl 35-41-Soul arrow till max leftovers on booster
Level 42-46-Booster leftovers on mastery
Level 47-52 Mastery Leftovers go onIron arrow
53-62 Iron arrow Leftovers go on power knockback ( crossbow)
Level 63-68 KNockback leftovers go on Focus or Eye of amazon(Bowmen basics)
lvl 69-70 Focus or eye of amazon
Path of a sniper
level 70-81 Straft Leftovers go on Mortal blow
Level 82-84 Mortal Blow ( only needs to be at 5) leftovers go on Eruption
Lvl 85-95 Erruption Leftovers go on Puppet
Lvl 96-98 Puppet (only needs to be level 5) Rest goes on Golden Eagle
Level 99-109 GOlden eagle *leftovers go on Mortal blow
Level 110-116 Puppet Leftovers go to Blizzard*(not sure if its relly called that)
Level 117-120 Blizzard