Pitbull
Verboten
Unfortunately that reasoning is flawed.
If you're opening with Ambush then your target isn't stunned and with our latency you're going to struggle to stay behind people to Backstab.
Not to mention the fact that after an Ambush opener you won't have enough energy to Backstab (60 Energy! WTF)
Swords have always been a better choice for us because of latency. If you're going to PvP a lot maybe go for a Hemo Swords build.
In Sub spec Ambush awards 2x combo points.
Shadowstep+Ambush, Kidneyshot, Backstab = dead
Or better yet
Shadowstep+Ambush, Kidneyshot, Vanish, Ambush, Prep, Vanish