Quickest way to do this is by doing all 1v1 or Triple Threat matches, turning off entrances and turn match pace to Quick and then go into the Match Rules and turn on "Finisher Match".
Once in the match, get your signature and finisher quickly and hit it on your opponent and that will count as a win.
Avoid tag matches and submission matches and any other game mode that will probably be slow.
I didn't customize matches to give myself infinite finishers to make it go even quicker as I wasn't sure if that would invalidate the achievement (like it did on the X1).
If it doesn't I'll change the solution.
You could also put this on Easy difficulty in the settings at the Main Menu to make it easier for yourself but I left it on Normal.