Strength    15    
Agility    15 
Archery    140
Iron Flesh    5
Athletics    5
Power Draw    5
Weapon Master    5
At level 25 any suggestions?
ironflesh will not give you much survivability as an archer often use very light armor. 
i would give up IF to convert skill points and gain skyhigh agi for wm and athletics to kite.
but... are you planning to stay with the horn bow? because imo a hybrid would be funnier. powerstrike 4 and some profiency, will make the 2h mace or military sickle (in secondary 2h mode) worthy when someone pursue you.
Horn Bow hybrid
Level 30 (4 420 577 xp)
    Strength: 15
    Agility: 24
    Hit points: 50
    Skills to attributes: 8
    Ironflesh: 0
    Power Strike: 4
    Shield: 0
    Athletics: 6
    Riding: 0
    Horse Archery: 0
    Power Draw: 5
    Power Throw: 0
    Weapon Master: 8
    One Handed: 1
    Two Handed: 113
    Polearm: 1
    Archery: 150
    Crossbow: 1
    Throwing: 1
or if you plan pure archer in big battles and wide maps / strat battles, check this:
Level 30 (4 420 577 xp)
    Strength: 18
    Agility: 24
    Hit points: 53
    Skills to attributes: 14
    Ironflesh: 0
    Power Strike: 0
    Shield: 0
    Athletics: 3
    Riding: 0
    Horse Archery: 0
    Power Draw: 6
    Power Throw: 0
    Weapon Master: 8
    One Handed: 1
    Two Handed: 1
    Polearm: 1
    Archery: 173
    Crossbow: 1
    Throwing: 1
pure archer. don't be afraid of 3 ATH. 24 agi mixed with 3 ATH will give you the running speed of 5 ATH. also this is a pure longbow/warbow archer for big battles. so no big soloing capabilities but maxed accuracy for long shots.
BUT the very best sniper build would be this:
Level 30 (4 420 577 xp)
    Strength: 15
    Agility: 27
    Hit points: 50
    Skills to attributes: 14
    Ironflesh: 0
    Power Strike: 0
    Shield: 0
    Athletics: 8
    Riding: 0
    Horse Archery: 0
    Power Draw: 0
    Power Throw: 0
    Weapon Master: 9
    One Handed: 1
    Two Handed: 1
    Polearm: 1
    Archery: 1
    Crossbow: 181
    Throwing: 1
arbalest, 2 bolts, 0 slot hammer (just to block with while waiting team mates)
this is a pure sniping build, no melee capabilities but nice accuracy and damage.