Cond thief
After forcing myself to run without Signet of Shadows, I find that I can’t go back to using it. I think you would find the same, especially since you’ve invested 20 into Acrobatics. I suggest trying Ice Drake Venom in its place. Chilled is one of the harder conditions to clense and you already have Residual Venoms.
Also, I would advise putting Fleet Shadow in the place of Power of Inertia. Might on dodge might not be as useful to you as getting into position quicker from stealth to land your sneak attack at the right time and from the right place.
“A wise man once said something. No one paid attention.”
I ended up switching Afflicted for Melandru for a bit more survivability while I was still messing around with this, then Thieves Guild for my elite to mess with other players while I stay ranged with pistol.
I’m still playing around with this build until I find something that I like though, as I’ve tried d/d and s/d builds in pvp. S/d seems nice now that they fixed the 3 skill but even though I run d/d for pve I find I can’t use it in pvp very well.