Fighter Archer build help

[4BR4]

Hi Ground, I'm playing a campaign of pathfinder. I have a level 4 human fighter that im making into a weapon master archer. I would like some help in optimizing him though. I have been working on a build thats not finished and I'm sure the order I took feats in might not be optimal or there may be some I haven't included. Any help or advice would be appreciated.

Starting stats (20 point buy system)
Strength: 16 + 2 (human)
Dexterity: 17 + 1 (4th level and all next advancements)
Constitution: 12
Intelligence: 7
Wisdom: 13
Charisma: 7

Feats
1. Point Blank Shot, Rapid Shot, Precise Shot
2. Deadly Aim
3. Weapon Focus (Longbow)
4. Weapon Specialization (Longbow)
5. Advanced Weapon Training (Focused Weapon)
6. Clustered Shot
7. Manyshot
8. Greater Weapon Focus (Longbow)
9. Combat Reflexes
10. Snap Shot
11. Improved Snap Shot
12. Greater Weapon Specialization (Longbow)
13. Improved Critical
14. Improved Precise Shot
15. Greater Snap Shot
16.
17.
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19.
20.

[Geddy2112]

Looks good.

For higher level feats, I would take one of the critical feats, to stack with the critical specialist class feature. So critical focus, then blinding/stunning/etc and maybe critical mastery.

[Elder_Basilisk]

Looks solid. However I'd consider a few things to mitigate some of your vulnerabilities. If you can find some room for iron will somewhere, it will reduce a significant weakness. Also I'd try to find a way to invest one or two feats in some backup strategies. Even with point blank master, etc, simply shooting things full of arrows has some weaknesses that may force you to do something else.

Before point blank master, having a bad guy corner you (especially with reach or step up) will make you provoke with every arrow you fire. Even after that is not relevant, you are still shut down by tripping or grappling and there are a number of spells and feats that shut down archery to one degree or another (deflect arrows, protection from arrows (before you have a magic weapon), wind wall, fickle winds, repel wood, control weather, etc--heck simple violent thrust telekinesis targeting all or your arrows can do it). Investing some feats in things like quickdraw and/or power attack will enable you to be much more effective in those situations where your primary strategy is ineffective.