Road to 20th Prestige is nearly over!
I'm really taking advantage of this double xp week xD

How I rank up quick

• Game Mode: Free For All - In my opinion this is the fastest way to rank up.
  
• Specialist and Hardline as your main perk - your getting bonus XP on your 1st kill, 3rd kill, and 5th kill. Then after a 7 killstreak you start getting double xp until you die. This works in FFA tremendously but it will also work in any other game mode.
  
• Weapon Challenges - Use each weapon for 300, and 500 kills. At those milestones you get 10,000 XP each. By time you hit 500 you'll also get the "Achieve Maximum Proficiency with this weapon" challenge which is another 10,000 XP. That's 30,000 extra XP for just using ONE gun. I use this method with each SMG and Assault Rifle and it really makes a difference.
  
• Secondary Weapons - Get 50-65 kills with each Machine Pistol & Handguns and you will achieve maximum proficiency with that weapon and gain another 10,000 XP for each one.
• Always try and win - Doing this you will achieve the best 'Match Bonus' at the end that you can possibly get.

That's all I have for now, I will update if i left out any other easy challenges.
I hope these tip's can help you really take advantage of double xp this week, and prestige fast!

I'd really appreciate if you could
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<3