To unlock this achievement you need to either;
1. Accumulate 56400 total Rank Points or,
2. Fight someone who has already surpassed the 1st Lord Rank. (You only have to finish the match, win or lose)
This is NOT a viral achievement, in the sense of being able to unlock it by playing with anyone who has the achievement.
The only way to obtain it is by doing either of the options above.
Now there are a few ways you can go about doing this.
You can either play legit and take your chances against spammers and pros.
You can get a friend to boost with you by using my method here:
Or, you can try to contact someone on the leaderboards who has a 1st Class Rank and see if they would let you fight them in a Ranked match.
Chances are, they won't. So your best bet would be to boost with a friend or try your luck playing legit.
I hope this has helped you have a better understanding of this achievement, if you have any questions then feel free to ask.