Not sure which one of your characters got the bounty, but for me it was on my Titan. Took forever but basically I ran as defender, used a high impact void shotgun, magnetic grenades, and disintegrate. On the rare occasion I would get heavy for my void rocket launcher but I mostly panic fired and only got a few with it :-) If you look at my status you see I am crap at crucible as well. But I ran control, some times with buddies, and used my ward of dawn to help me stay alive. Occasionally I would pop out my badger and shoot those long range guys out of frustration. I didn't get any points but I stayed alive, well some times :-)