My Specters are Host and CArnage Chieftains so I can get a constant supply of Endurance and Power charges. I did at one time use the Slave Driver and man is it FAST moving and fast casting. but I have little ot no spell damage in my build now so I dont get much out of them.
I have been trying to think of something I can make use of to replace the specters for defensive thought. I was thinking CoDT> Steelskin but that is the only defensive I know of I am more a urn n churn player so I never did think bout defense.