You must be number 1 on the leaderboards to get this achievement. The achievement pops next match when you are actually playing as Kane.
You have to play with at least 4 accounts (1,2,3,4). If you want to rank up with account 1 he has to become in first place. You are using your highest 3 accounts to build up a ladder for your next dummy account (account 1= fresh dummy, account 2= highest dummy, account 3= second highest dummy, account 4= lowest dummy). Start up the match with 3 rounds.
player 2 kills player 4
player 3 kills player 2
player 1 has to hold the grenade. player 3 kills player 1 and has to stand on the grenade after that.
Second / Third round:
player 3 kills player 4
player 2 kills player 3
player 1 has to hold the grenade. player 2 kills player 1 and has to stand on the grenade after that.
player 1: 600k
player 2: 200k
player 3: 100k
player 4: 0
Play double the amount of games it took for the fresh account to overtake your highest level account. Player 4 will replace his dummy with a new dummy. He will become player 1, player 1 becomes player 2, player 2 becomes player 3 and player 3 becomes player 4.
You do this until your dummies are rank 1+2 (third account in the top 10) on the leaderboards. Then you start playing with your main account. This is the most important part. DO NOT PLAY WITH YOUR MAIN ACCOUNT BEFORE.
Of course you can also play with 5 or 6 players. They would have to suicide. 4 players are minimum.
If you do a mistake the host can dashboard.