From my experience,
Fetter Ward - useless, you need to cast beforehand, only last 5 seconds and recast of 240.
fully enhanced might be a different story, It could be really useful for bursting down a player, I have not tested.
quick tip for avoiding that first sleep, don't run into the middle with your whole team at the beginning of a match.

Purify - yum, point it up.

Weapon Throw - this has not been impressing me. I have with one point in it and when it does inflict heavy, yay!
if not, booo.

Enliven - You already have invigorate.

Impulse Rush - I am digging this, not so much for the TP reduction, but the waiving of directional requirement on combos, I use this at the beginning of burst. I'd like to try out enhancing this all the way.

Skewer - Damage seems nice, but lowering int, meh, seems too situational. Int is tied to attack magic potency, so you don't effect cures or sleeps.

As for Traits, I like them, 1 slot is like an extra piece of material, 2 gives you a stat increase of 12 overall. Thats like another piece of gear.
Also note you can use potions in PVP to boost stretch etc, can be great for bursting.

with 2.28, We'll be able to switch up where we allot our points, Then we can really start testing.
Also if anyone has differing experiences with the above, please post it up, the more info the better!