Considering the low amount of PT needed for War Darts, 4-5 PT should be enough for a level 30 build then. For that about 100-120 throwing wpf is alright as well. War Darts will not deal such amount of dmg that you can kill that many enemies with them alone.
Level 30 (4 420 577 xp)
Strength: 21
Agility: 15
Hit points: 62
Skills to attributes: 2
Ironflesh: 3
Power Strike: 7
Shield: 5
Athletics: 5
Riding: 0
Horse Archery: 0
Power Draw: 0
Power Throw: 4
Weapon Master: 5
One Handed: 115
Two Handed: 1
Polearm: 1
Archery: 1
Crossbow: 1
Throwing: 112
Level 30 (4 420 577 xp)
Strength: 21
Agility: 15
Hit points: 60
Skills to attributes: 2
Ironflesh: 2
Power Strike: 7
Shield: 5
Athletics: 5
Riding: 0
Horse Archery: 0
Power Draw: 0
Power Throw: 5
Weapon Master: 5
One Handed: 115
Two Handed: 1
Polearm: 1
Archery: 1
Crossbow: 1
Throwing: 112
For Jarids or Javelins you should get 5 Throwing, so either that 21/15 build with 5 PT is alright or you take a 18/18 build, also with 5 PT but 6 WM.
Level 30 (4 420 577 xp)
Strength: 18
Agility: 18
Hit points: 53
Skills to attributes: 2
Ironflesh: 0
Power Strike: 6
Shield: 6
Athletics: 6
Riding: 0
Horse Archery: 0
Power Draw: 0
Power Throw: 5
Weapon Master: 6
One Handed: 115
Two Handed: 1
Polearm: 1
Archery: 1
Crossbow: 1
Throwing: 125
---
I currently use a lvl 30 18/18 build myself, for Jarids and a 2hand sword.
Level 30 (4 420 577 xp)
Strength: 18
Agility: 18
Hit points: 65
Skills to attributes: 2
Ironflesh: 6
Power Strike: 6
Shield: 0
Athletics: 6
Riding: 0
Horse Archery: 0
Power Draw: 0
Power Throw: 5
Weapon Master: 6
One Handed: 1
Two Handed: 115
Polearm: 1
Archery: 1
Crossbow: 1
Throwing: 125
--
e: Erzengel, wheres the PT in ya build, otherwise yes, 18/18 works fine!