(adsbygoogle = window.adsbygoogle || []).push({});
This involves you being host, and not giving a **** about your K/D ratio.
1) Get host
2) Go any game mode, I tend to do SnD because it is the fastest way to gain xp
3) Join the match and relax
You will only get xp from the match bonus, which is around 2k each match.
You won't get kicked out, because of lack of activity since you are host.
In 1 night, you will go from lvl 1-72.
I've tested this and it works.