With the recent Patch (1.04) Vault (Trail of Cinders) has been buffed to 1500% weapondamage over 3seconds.
If you got now stacked Sharpshooter, u'll have about the double amount of weapondamage.
The Exploit here is, that Vault (Trail of Cinders) does not consume the stacked Sharpshooter.
I got 50k dps unbuffed & 120k dps buffed with sharpshooter. My Vault (Trail of Cinders) ticks for 200k/sec, 600k dmg over 3secs.
So, if I Vault over an elite group in Act 1 they die. Almost every elite group dies within 3seconds.
Aslong you dont autoattack any mob, your damage will stay high.
Tips for easier "vaulting":
Bind the "move to" button in the interface.
Use Smokescreen (Lingering Fok)
Use Preparation (Backup Plan)
Video:
Butcherkill (4,2mio hp) in about 8sec with 55k dps unbuffed gear:
http://youtu.be/OyAhWlvnsu8