Sub Styles would be unlock able AFTER you unlock your main fighting style to get a sub style under YOUR styles trainer A white sub style will pop up depending on your fighting styles You will Only be able to have 1-2 Sub styles depending on your config If NOT changed you will only be able to have 1 sub style here are my ideas for the sub styles Ryusoken, hasshoken for brawler
Swordsman would have 2ss and 3ss
Black leg would have Jao Kun Do and okama Kenpo Art of weather would have 1 extra move that will allow you to take Zeus from the Soru Soru no mi if added otherwise just like buffed lighting and doctor would get plague doctor and sniper would get Usopp tactics