I thought it was quite easy, between my void shotgun, void sniper rifle, void fusion rifle, void heavy machine gun and void rocket launcher.. and my void grenades, void punch... void auto rifle from aetheon.. I managed it in about 2-3 hours of crucible, mostly because i was doing control bounties at the same time, and you get killed quite indiscriminantly there x3 you should be stocking up on all types of damage on your weapons anyway, so it's more of a 'use specials and heavys to get 100 kills, each 2 & 1/2 deaths removes 1 kill' thing. It's an exotic, there's supposed to be a little effort in it.