The thrashmobs in The Emerald Nightmare actually has a small chance to drop epic ilvl 860+ from pickpocketing, so rogues can use this to "farm" free epic items. The only confirmed enemy that does this is the trash related to Ursoc, but there is of course a chance that other thrash can drop it as well.
In order to be able to do this, you either need a lockout in which you are able to get to the thrashmobs yourself, or follow this youtube guide to grapple up to a certain point and access the trashmobs.
Once there, just pickpocket all the trash and hope for the best. You can get pretty much any thrash mobs drops, such as the Pendant of Liquid Horror. The itemlevel is from 860 and upwards, since they can be warforged to get higher ilvl.