It's funny, but I still haven't seen this new build of her...I wound up changing my party for a Support Kiyoko
I open up with flashfire, so that Cleave will benefit from Twist The Knife. I opted for Flashfire because it gives two negative status effects.
Personally, I prefer to start the fight with Deadly Shadow. Because obscure, attacking all enemies at once, two more useful (in my opinion) debuffs plus bleeding from the kunai.
Pictures below is my build,
Hmm, that's an interesting set of Powers you have. I would say that this build is not very suitable for Undermountain (too many crowds, knockdowns and disarms), but the Eviscerate in the Encounter slot makes up for this by being able to make any boss you encounter very sad without having to change your powers every time you change location...
P.S. My current (thief) skill set is Equilibrium, Celestial Smite, Cleave, Deadly Shadow, and Unbreakable.
It's possible that this build is a bit outdated (I no longer cut through crowds of enemies as easily as I used to before version 0.5.0), but it's still quite reliable, the increased enemies durability and reduced healing is more of an annoyance than a real problem.