You don't get extra healing from the Mittens via Imp Divine Spirit and Spiritual Guidance, because the Mittens lack spirit. 

These are a definite upgrade for me, but I think the mileage you get from them is largely dependent on your spec.

For me they'd be

74.7 Healing
5 mp5 inside FSR
19 mp5 outside FSR

But I have Imp DS, Spiritual Guidance, Meditation and 3/3 Primal Mooncloth.