Play Control with a void fusion rifle (Light/Beware would be best) and remember a very important fact that they don't tell you: assist count towards your goal. this means that not only will every assist help you, but anytime you're taken out trying to kill another, if you at least hit them and one of your teammates takes him out, your death has just been negated. Once I realized that, I started to steadily get through this bounty. Took a few hours, but I did it.