Like I said that option is up to you. I just find that with this build and the Def skills I do not take enough dmg to make Purifying Chastisement worth while vs the Dopples extra dmg output. That and I gave my Dopple the Gruesome Inquisition tree line so he is more or less the 3rd skill line for me lol. but like I said if you look at the way it works out, there is plenty you can move around and still keep it and effective and fun build with a play style more to your liking. I find the survivability is higher this way then with other builds I have tried.
Guess what I am saying is my pr