Here’s the build I’m using on my archer Inquisitor on Nightmare difficulty:
Archery Tree: Death from Above / Long Shot / First Blood / Explosive Shot / Chain Reaction / Pincushion / Full Draw / Stunning Shot
Sabotage Tree: Poisoned Weapons / Infected Wounds
Subterfuge Tree: Stealth / Easy to Miss
And a video to better explain it:
Thanks for the great video. It’s quite informative. =)