This is my standard setup for actually playing the game. I sometimes switch out Orison of Healing for Judge's Insight (especially on my current mission, Riverside Provence).
The reason I use this build is because I love gaining insane amounts of health on my Barrage shots. I use all three Bows at the in the same run usually.
Try this (play with the attributes based on how you like it):
Poison Arrow {E}
Troll Unguent
Distracting Shot
Savage Shot
Whirling Defense
Throw Dirt / Ignite Arrows / Kindle Arrows
Mark of Pain / Shadow of Fear / Suffering / Faintheartedness
Res Sig