I don't think my gear is best in the world or anything, but it is decent. I can only farm MP1 efficiently (i.e. 11-12 minute Alkaizer run), and MP2 pretty well. MP3 is too slow for me, and it works out to be a poor use of my time.
On MP3+, I pretty much have to stop using Elemental Arrow and bring out something a bit more powerful, like Loaded for Bear. But if I do that, I basically have to not use Vault, which is bound to lower efficiency. Also, using Vault is not even a good idea anymore since it wastes way too much discipline. There's nothing worse than vaulting for speed but then not having any discipline to survive during a long trek (and thus dying a horrible death). This doesn't happen on MP1-2.
So if there are any Demon Hunter's out there smashing through MP5, I'd love to
1) See your gear
2) See your build
3) See a video as proof