ypu found this out before i saw the post or the video...
take the vrit build swap one of the visages for illusion of haste..
run past the rampaging things...keep refreshing haste run down the hill throw up a VwK and haste out to the safe spot shown in video... heal up wait for all the spideys to cluster....
prep phys resist channeling and arcane echo... run into mob cast VwK keep spamming vengfull weapon for faster kill times... and recast phys res and channeling 2 more times before the mobs all die from VwK run up to boss spamming vengfull weap... throw on vwk when it recharges and echo vengfull weapon... cast a mend body in between if needed... keep vengfull weaponing him to death.... collect your green on the 30rth run or so (takes froever for him to drop it anymore)