So I'm a ways off from this encounter, but I'm struggling with how to set it's CR to ensure my players are at the appropriate level before reaching that point.
I really like the Dark Folk race and the Hag Coven abilities, so I'm thinking of combining the 2. For a combination of story and power level desires, I'm making certain decisions about templates added to these creatures. Anyways, the coven is made up of these proposed characters:
-An Advanced Witchfire
-An Advanced, Shadowfire Blood Hag
-A Dark Caller with ~11 levels of Shaman and the Coven Hex
So what's the CR? 17?