Traits for power longbow ranger?
As a very, very dedicated longbow Ranger, I stick by my idea that Quick Draw and Malicious Training with Jungle Spider Wolf are the two most important things you can do for a longbow build.
Saethe — Favorable Winds [Wind] — Maguuma
I use the quick draw, which is mandatory for an archer. Steady focus is mandatory for everything I believe. Remorseless is handy as the longbow #3 has low cd and gives you an Opening strie pretty often.
For temples or anything with mob zergs I use Piercing arrows, in most PVE situations Eagle eye, if possible.
Then it depends on your secondary weapon. Since I gave up and use ranger for PVE roaming, dailies, farming and temples only, I use greatsword for it’s utility.