Not possible mate. You need to hack the EA servers to change your stats and this is illegal.
What about setting Challanges to 99% like in Black Ops 2?
And then you finish the same Challanges every match = wow, much xp, fast level
Example: www(.)mpgh(.)net/forum/showthread.php?t=813346
Not possible mate. You need to hack the EA servers to change your stats and this is illegal.