Well since i have only been to 2 deathwings in this guild do to sickness and my pc exploding I have yet to been able to get it and i do not know the state of everyone else's trinkets. But i used this thread (http://www.mmo-champion.com/threads/1033285-BiS-Trinket-lists.) as a basis and have a long list of trinkets i SIM for my lock every time i get a new piece of gear. LFR WoU(have it) is not better than normal insignia from my tests personally and simcraft. The reason it sims nicely with demo is that when it procs in the beginning your doom guard also gets that haste if you cast it after you get the buff which adds a couple extra doom bolts. But i digress this has become more of a lock discussion because of us then a heroic Ultrax discussion.