I would second ditching the poison synergy for the most part. The build just seems a lot better when you drop envenomed edge (Other than 1 point to move up that tree) and stick with Blade Honing/Battle Frenzy as your sustained. then you have Quake, Smoke bomb, Frost Trap all of which can stun.
Without Envenomed Edge, you really don't have much Poison Synergy barring Alchemy use (and/or Poison Elemental weapons, if they exist; I assumed no since EE feels silly if you can just poison coat weapons via Alchemy or find Poison weapons). EE feels kind of like a requirement for good synergy with Mysterious Toxins.
Rough Stun/Finesse Might Build
This is what I was potentially looking at. Quake, Smoke Bomb, Frost Trap, Shadow Flare, Shield Charge, Relentless Assault. A lot of actives but other than Quake fairly mana efficient... and shadow flare + quake while having mysterious toxins seems pretty effective aoe. I just don't see the need for envenomed edge to apply the poison effect.
Maxed out Quake is 114 Mana to use with a base pool of around 75 available at level 40 with no +Mana equipment. You actually cannot use it in that build without approximately +80/+55% Mana from equipment which is why I went 1 Quake/5 Aftershock for the 96 Mana cost (+30 Mana/+20%). Even then, this is a fairly mana starved build in general since RA is a constant spam if you want it up for the no-flinch status at 50 Mana a pop and then there's the 71 Mana per Smoke Bomb so that's why I decided to drop Quake from one of the builds and focus more on X button to win.
Also, I think there's zero reason for more than 1 point in Bloodlust. 1 point is +4.4 HP/swing on average and 5 points is +6 HP during the 20s window of Relentless Assault. Not really a good investment, pesonally, for those four points vs topping off some of the 4/5 skills in the build and the one point of Power Strike.
That build is of course very dagger centric so it's a little different than what you might want (Don't care for the faeblades at all myself) but it seems like fun.
Just one weapon, though? Feels a little odd to run a single weapon build, especially when you run into needing about five points to spend on it or Shadow Flare. Either way, Dagger/Faeblade are interchangeable in the build as far as point distribution is concerned.
I'm still likely to just be rolling my staff/chakram Champion though, the lure of huge crits may not be enough for me.
Finesse/Sorcery is the build I'll be going anyway, I just wanted to look at Might/Finesse since I don't think anyone's really talked about it. It's surprising how much there actually is in the build, though. I wrote it off as seemingly uninteresting but there's a lot to get out of it.