ONCE YOU ACCUMULATE 50 - 60 points, you can spend them on a skill set, pop the achievement then go to the dashboard. Upon returning your points will be unspent then you can spend them on another skill set, rinse repeat until you have all 4 achievements for all skill sets:
Fight Technician
Throw Master
Submission Master
Strike Master
Quick way to accumulate skill points
------------------------------
BOOSTING METHOD
Go in to player match with your created character(s)
Alternate submission wins, takes 10 seconds per match
Press the "A" button to rematch and the next match will start in less than 10 seconds
You should get "S" or "A" ranks for each match and you will jump a lvl for every 2 matches won so after 128 matches (256 for both ppl boosting) you will reach lvl 64 and have more than enough skill points.
**SUBMISSIONS ARE EXECUTED BY PRESSING UP ON THE RIGHT THUMBSTICK THEN DOWN ON THE RIGHT THUMBSTICK THEN REPEATEDLY TAPPING THE "A" "B" "X" or "Y" BUTTONS**