All you do is, When you do normal neminis boosting, dont use guns, just use you defibilator you get your neminis up faster and you xp goes up alot quicker, Make sure you hold thetrigger and aim at there head for them to be shocked, I was boosting and my groupwas using the defibilator's and we got 3 kills each for every 1 kill each the got, trust me guys this is the best way to boost. Please leave a comment on how it whent.

Thanks.
-xJackDeegan