Stigma or Non-Stigma?

Ok Tysm for your replies it opened my eyes and mind to many things, now I understand that it is not that simple, it is possible though, but it would be hard if stigma would be implemented in Siel, I wish Siel would go Stigma though O_O I like how you as a player chooses what skill tree you would use, and which combo to counter other classes, and etc.. But... Ya as you said, it's the system.. I guess Siel would be Non-stigma for evs..