I am currently using +3 war darts, various shields, and +3 flanged mace. My build is 21-15, and while a bit slow, it is extremely effective.
21 STR
15 AGI
113 1h wpf
110 throwing wpf
3 Ironflesh
7 Powerstrike
5 Shield
5 Athletics
5 Weapon Master
4 Power Throw
It works great because of the lower PT, you can wear heavier armour to last longer in combat. I find war darts to be the most effective at preventing enemy crossbowmen from reloading. You can very easily lob wardarts over the heads of your teammates for damage, and headshots. Headshots are absolutely brutal with wardarts. They're also effective at killing archers; they don't really consider people throwing darts a threat.