Demo Gear Question

[WildcatTM]

I'm having some DPS issues since I transferred to a new server, so I'm trying to put myself in a better position. I have 3 tier pieces (2 LFR, 1 Normal). I'm having a tough decision deciding between these shoulders:

Mantle of the Thousandfold Hells (LFR)
Shoulders of Demonic Dreams
Frost-Kissed Shoulderwraps

This is my armory:

Valefar

I'm not too sure replacing my Mantle of the Thousandfold Hells with one of the reputation shoulders is ideal. Or maybe the answer is obvious. I'm currently running numbers, so I can't turn to SimCraft for a quick answer. One thing I'm really trying to do is get rid of any crit gear that isn't necessary.

[Lysakers]

I would go for Shoulders of Demonic Dreams.

Since you are not eligable for 4-piece anyways, there is no real reason to hold on to the shoulder tier piece.
Since you have the UVLS crit loses its value, and you should go with the shoulders without crit.