The guide we have on the forum ATM is outdated, and is appropriate for the old 70 cap times. I'll try to sum up the basics of the full STR bow build, as it is at the 80 cap with new skills.
STR bows are all about criticals. Lately, people are playing alternative STR hybrid bow builds, but I'll stick to explaining the classical full STR build. The alternative STR builds are a far larger and debatable subject.
Naturally, you want to put every stat point into STR. More STR means higher criticals, which is important for a bow build, as it relies heavily on criticals to kill.
Let's get on with the mastery layout.
You will, naturally, want to max out Pacheon.
The skills you absolutelly need are:
Anti-Devil Series - packs a critical increase, that gets progressively larger with each book. It's the core of the full STR bow build.
Arrow Combo Series - gets crucial at level 73, with the knockback capability
Hawk Training - black/lightning hawk for PvE; white/blue hawk for PvP... that's how I see it
Explosion Arrow - decent AoE, gets really powerful at level 69, with it's third book - the Demon Arrow. Demon arrow is a great opener and causes great damage. The downside of it is the long casting time. That's why I'd use it mainly as an opener, but of course, it can be used in mid-battle as well.
Strong bow - has become a crucial skill since the euro update. Its 3'rd book has an attack range and critical increase, apart from being able to deliver stun status. Also, the casting time is shorter than that of demon arrow, the damage being essentially the same.
Of course, get the passive skill as well.
Mind Bow and Autumn Wind are optional. They can be useful, but don't spend SP on them if you are in lack.
As a STR build, you also need maxed Fire.
From the Fire tree you need:
Fire Force (imbue), Fire Shield, Flame Body, Fire protection, Fire combustion and the Passive. The fire Wall is optional.
Also, aim to have maxed Lightning, or, alternatively, get lightning as high as you can, if you don't max it. Necessary skills are:
Piercing Force, Grass Walk, Ghost Walk, Concentration and the Passive.
Cold should be anywhere between 20 and 60. You need the 20% snow shield, but extra physical defense can never hurt.
Ideal mastery layout:
80 Pacheon
80 Fire
80 Lightning
60 Cold
As for the equipment, you should wear Garment (for the speed increase and MP consumption reduction). However, if you can get your hands on a protector set, don't hesitate on using it.
Hope this helps. If you have other questions, feel free to ask them.
