My scarlet ring is finally completed. From using free purple cubes to legendary rank.. to 21% dex. You can get free purple cubes from EB (Elite boss). Open the box and you get a chance to get purple cube.
Also in the middle, I used CSOG, the first scroll it +5 wa, then +3 wa making it wa 9 and I 17 star it, it becomes wa 24..
Star-ing to 17 stars (not 18 stars scare booming)
Then using additional potential scroll, and 1 add pot cube to EPIC rank, then 3 add pot to get wa 11.