My whole idea/theory was keeping 5 combo point Recuperate rolling and save up 5 combo points, when I got below 70% health use Cloak of Shadows and have a 100% uptime on Feint while specced into Elusiveness. I did the math ages ago but it seemed do-able. Sadly I never got the chance to because no one was willing to help me clear all the trash required.
Again that was at level 85.
EDIT:
Actually maybe I was planning to Cloak the final burst she does. I can't remember exactly what my plans were.