I don't know if this 'helps', but I do remember vividly thinking at one point that Empoisoners weren't 'all that'... and when I finally used them, they cast Decay and that was that.
I don't know much about C'tis, but I do know that Desert Tombs is an absolute bLast now.
One small request I would make of the designers is to give Unholy-5 priests a 'unique' Reanimation ability. I believe that for BE/AE Ermor they are Lictors (already). Soul Gate could get Ghosts. As for Desert Tombs, the most thematic I think would be Banefire Archers. Just an idea.
Scott