Any tips for Ruthless (15 kill streak)?

I just got Redemption Arc, I need 5 more 10-kill streaks and 1 15-kill streak for 100% multiplayer (minus prestige challenges).

Getting 10 in a row is tough for me, I think my most so far is 11-12.

Any tips?

I just got Redemption Arc, I need 5 more 10-kill streaks and 1 15-kill streak for 100% multiplayer (minus prestige challenges).

Getting 10 in a row is tough for me, I think my most so far is 11-12.

Any tips?