Lol, world drop my friend, you ain't farming this unless you got like 10 accounts going off at once botting. It's like a 0.2% drop rate, there is NO good place to farm it. Contrary to popular belief that the new 70 BoE epics have a good drop rate at Elemental Plateau in Nagrand, honestly it's probably b/c so many people Mote farm their so their's a higher probability it will drop just b/c of the massive slayings that go on there, not really because the Elementals like dropping Epix or something.