Last night, I was lucky, I managed to get two items that I needed for my Witch Doctor. For one of the items, I managed to get two of it. I was able to extract the power and I have another to equip, the Tall Man's Finger ring. I got it via purchase from Kadala.
I also managed to upgrade a rare staff and got the Wormwood staff which I used to extract the power at the Kanai Cube.
I require one ring, one voodoo mask and one belt now. Three items left.