thats a very ingenious way of farming! the only downside i can possibly see to that build is the death penalty, when you kill all the baddies at once, your health will skyrocket, but i don't think that will really matter because there won't be enough guys left to kill you after.
right after the protective bond nerf i had tried the exact same skill set but i kept dying right after casting arcane echo. i was doing this with the 55 health build with no dp so healing breeze wouldn't keep me alive against that many monsters. because of this i eventually abandonded the idea and went to the traditional protective spirit build.
i can't wait to try this when i get home

thanks for sharing this with us!