Found a nice Stigma Skill calculator on Keen’s forums:
Can be found here!
Should be really useful in deciding a build for your character. I am really interested in seeing how they expand the Stigma skill system as the game grows. At the moment it is pretty simplified but they have said they will be expanding it. Will we ever see the depth and ability to completely change your character that you see in WoW? Hard to say at this point but it will be an interesting thing to watch!