I just played with a DH using a build similiar to this last night. he was absolutely tearing things up. I was playing my wizz (blizzard/hydra) and I could barely get off 1 hydra and 1 blizzard before he had everything destroyed. He was tearing things up left and right, champ pack (no problem), eliets 1-2 seconds, bosses, 5-10 seconds usually. Granted this was act 1, and it does cause him to die more often (he said) because he had to jump into crowds sometimes, but this was the most fun I ever had playing diablo, and I wasn't even doing the damage myself. I was lucky to even have time to get blizzard up and running he was taking things down so fast. 1500% damage from this skill is rediculous. I'm sure he had high DPS too, but it was so awesome.
Not to mention that he got around the map so much faster due to vault. I felt like I was running through molasses compared to him. Tempted to roll a DH because of this.