Here's a build that often gave me VERY mixed results, but it's fun to play regardless:
Level 31 (15 str, 21 agi)
skill points:
4 ironflesh
4 power strike
4 power throw
7 athletics
7 weapon master
6 shield
Proficiencies:
One hand: 100
Throwing: 145
Wear super light armor (I usually go with a Padded Jacket or Padded Cloth; you don't need much, just something to keep you living past getting hit once. You can outrun most enemies anyway, and with such high Shield skill, your shield can replace armor reasonably well, until some 2h hero comes around and bashes it to bits.)
Use your throwing to support melee team-mates (I tend to hold off on this one due to fear of teamwounding), harass heavy infantry (lock them in pain state), and to keep archers from going to town on your team-mates. Afterwards, you can use your mid-tier melee stats to do competently well as a light-infantry support to your team-mates.
I usually go with:
12 war darts/ 6 javelins
Iberian mace (The war darts can kill off most enemy light troops, so it's good to save this for the heavy armor guys who can survive your dart spam)
Kite shield or Round Shield
OR
9 Heavy Throwing Axes
Kite shield or Round Shield
And I reserve last axe for melee.
Although this build makes a good support harasser, you tend to get completely outclassed by many builds in a 1 on 1 encounter. However, you can rely on your speed to find shelter or team-mates.
Next respec/retire, I'm going to switch things around a bit: Instead of using throwing as my main combat, I'm gonna just use it as pre-charge peppering, and focus more on strength, ironflesh, and power strike, as many of the above posted builds have done.