I've been messing around and came up with the following:
Traps: maxed
Veil: maxed
Shadow storm shot: maxed
Pierce: maxed

Durable passive maxed

I also have a fifth skill, packs, maxed as well. I use it in pve only. I just swap it out for pierce in pve so I don't have to keep buying respecs.

Strategy:
Get ur team together in the middle of the ctf room. Wait until ur tanks engage then sneak up and drop traps and veil. Shoot shadow storm as u run away. Keep running away until ur out of range. If u run into someone charge ur pierce and ull shoot right through and passed them. Then keep running until the clash is over. If ur team won go back to mid and tell them good job, it was probably because of ur trap crowd control and veil buffs. If they lost then go find a better group.

I haven't died very much at all.