I agree with Ualaa, I recently added my priest to my 3xDK team and use IWT on the DK's when required from fear. I can recover from one even if I'm 35 yards away with IWT and my priest is setup with a fast MassD to get them back in the fight.

I have to say though, I'm still bad about my healing binds since it's so new for me to run a healer.