Unfortunately I'm no big PvPer; I can give suggestions but I can't promise they'll be of big help. I hear that /Dev is a pretty good secondary to take into the zones right now; I imagine that is because:
Web'nade has a -jump and -fly, Caltrops is autohit with -run, -jump, and Targeting Drone gives +Perception and +To Hit. You'll probably also want to slot TD with the Rectified Reticle +Perception. (You may even want Tactics; I'm not sure.) I'm not sure how good Gun Drone is; seems at least having a pet that will attack when you aren't would be a good thing. And if you set up a bunch of Trip Mines in a secluded area and someone snuck up on you.... Cloaking Device + a stealth IO would make you real stealthy; Smoke Grenade is not autohit in PvP so I imagine its usefulness is very limited.
Explosive Arrow is going to be one of your biggest hitters because of the KB and the long cast time. If you slotted for range, you could specialize in opening with a Snipe and pelting from a great distance. Web'nade would keep things from jumping or flying to you, and the assorted things you set on the groud perhaps would provide a solid place to fight as well as the nasty Trip Mine surprise.
As for PvE:
There are really no bad powers to take in either set. You can use Stunning Shot and Taser to stun a Boss; personally I skipped Taser and just keep the boss on Caltrops with Web'nade. Stunning Shot is mostly used on Lts or annoying minions. I've found there's a love/hate dichotomy for Time Bomb. It's the last thing you want to set up when laying traps, and requires you to pull if you wish to also have Gun Drone up.
I've found my attack chain is solid without Snap Shot, but it's good to have when you're a lowbie.
Thunderstrike is my choice set for single target ranged damage. I went with 6 on the 3 regular blasts. I used 4 pieces of Kinetic Crash in Explosive arrow for the KB protection, and filled it out with 2 Posi's. 5pc of Posi's isn't bad for Fistful of Arrows, but I went with 5 Detonation. Caltrops got a Posi's chance for energy, Impeded Swiftness chance for smashing, and a Tempered Readiness trimod. I used 5 Oblits in Time Bomb, a mix of Scirocco and Multistrike in Trip Mine, and a mix of Devastation and Entropic Chaos in Gun Drone. Rain of Arrows got a mix of the 3 Targetted AoE sets for max Recharge and Damage, with a bit of End Redux and Accuracy. The rest of my slotting were mostly commons and filler pieces for efficiency and +run speed.