I've tried your build with a signet variation and it's amazing - at least in PvP! ^^
(Still need to test it in roaming which I don't do as much as I do PvP these days)
But see yourself :D
You'll also see that I ate a lot of dmg. But IIRC I didn't die at all or at least not more than 2-3 times in those fights. I guess i ate most of the dmg in reaper shroud which I sustained away with Blighter's Boon and LF Generation with #4 and RS AA.
I found that "Rise!" didn't help me much in 1v1s and against thieves because I'd only hit one target or not at all.
Also, the corrupt on signets helps with CC and against Warrior's Berserker Stance which helps a lot since you still rely a lot on chill and fear even though you're power based. :)
Let me know what you think :)
(Oh, and the one screenshot where I only run the Locust Signet, I just put in here for the lulz because of the >800k dmg :) Didn't run the Signets of Suffering trait in that match yet.)
I guess, the passive heal of the signet also helps to outsustain some dmg :)