So I'm wondering about those black soul stones and the necklace from the witch doctor (MD or ThD?) again. I would assume he would need to place them in their own bones to hold them. Though it could be that the bones are specially prepared and can be used again with different soul stones. Unfortunately we won't get an answer to this until when HM and Chief Mist both go back to the HT. This probably won't happen until they start building the second portal at the HT. I don't think she will cleanse the krystals without him.