It's a nice guide overall, and bow sins can be very fun, and decent in pvp if you use em right. I've played em, I've seen lots, there not as umcommon as you think.
I think you should definitely max dragon flight. Since you are wasting remaining points anyway, why not? You already wear shadow dancers, trangs and bramble. You're DF damage will be very strong. Basically with maxed dragon flight and all the venom gear, you can destory sorc's and bone necs with dragon flight. It also allows you two use two strong types of attacks. It's a very strong skill. Have dual claws on switch so you can weapon block. Shoot guided from a distance to make the sorc/nec come to you because he's tired of getting shelled by arrows, then when he does, weapon switch and dragon flight. Immediately run out of there and switch back to bow and repeat. It works well vs any caster really. Range them with arrows, then DF them when they get careless.
One thing though, as fun as these sins are, they really aren't the killers that the author is saying they are. I think most people reading will know that too. At least half the char builds will beat ya, just like bowazons. MANY weaknesses. I think you should just be proud of a nice guide you wrote, and be unique. But once you start flaming people and calling people out, your build will be exposed as average at best in pvp. Just chill out on the challenges. Owing WW sins, trap sins, you've got to be joking
Good guide though.
BTW: I noticed in a post, you said you want to ideally get 80% FHR. Actually, you want 86%.