Originally Posted by
lolalola
Signature spell is a spell which defines the spec, which makes it outstanding compared to other classes. Its the unique flavor the spec has which no other spec has and, if they do, its a less powerful version of it.
Well lets see. Nightfall is just something RNGish and the other dots yeah, they got some unique flavor (Agony esp). But signature? Note with signature we don't refer to the thing you keep up all the time, or your fillter (Diablo 3).
Which spell(s) would you say defines Affliction? You could say oh its MG or Haunt cause it strengthens dots.
I'd be inclined to agree, and I'd be up for some kind of agreement on Soul Swap being a signature spell but maybe not the most important one.