Nice to see you've read it
no stages, dont make your fanfic a canon terminology.
and to SithKorisomething, dont remember name: most probably that Driod killed them all by Moff's order
But yes its just a theory. But I do think that there are different types of Sith, and I do believe that to be a Sith you have to be strong willed. Because your effectively doing battle with the Force.
And yes I agree, that Droid so killed them all. He mentions his skills include 'man-slaughter' *hint* *hint* that droid had a part in it. But I also agree that Sith often make rash and wasteful decisions as they often lack control of their emotions - killing enemies or in-subordinates, when they would have been more useful to them alive. Anger is useful, but only when focused and controlled.