Strength 21
Agility 15
Weapon proficiency:
One Handed 100
Throwing 121
Skills:
Power Strike 7
Shield 5
Athletics 5
Power Throw 7
Weapon Master 5
This is my current build. Basically just a hybrid more than a pure thrower, but you get 7 PT (so can use all thrown weapons) and enough PS and melee wpf to be effective. You might want to get 2h wpf instead and 5 IF if you want to be more powerful in melee.
For a full throwing build, you would have to ignore PS and get as much PT as possible. I'm thinking 8 or 9. 24/12 might be good, but a 27/12 is probably the best for pure throwers. I'm also thinking you can drop athletics since throwing slows you down a lot anyway. I spent most of my generation with 0 athl, and going up to 5 improved it a bit, but the throwing weight still slows me down a lot.
Something like this is probably the best pure throwing build around:
Level 30 (4 420 577 xp)
Strength: 27
Agility: 12
Skills to attributes: 8
Power Strike: 6
Athletics: 4
Power Draw: 9
Weapon Master: 4
Throwing: 140