I'd advise you not to finalize your plot until after the release of Chimera. It could really screw things up.
Be careful how you write your villain (who I assume will be Alric). The personality of the host seems to remain somewhat with the levelers.
By that time, most of the living dark will have either have turned to the light or been conquered by it. That's not to say Alric couldn't win himself a lot of followers though.
Watch those scripting bugs. Don't do a Pools of Iron or Through the Ermine.