Blur is a 60 second cooldown, and no one takes the auto trigger talent. It’s terrible.
With that said, the OP seems to play RBGs mostly. Outside of Blur / Darkness DH is pretty easy to kill in RBGs. Solo shuffle / 3’s they can be very tanky, but in RBGs they can be a pretty easy kill target.
Unholy DK is very strong against casters, and with Deathstrike and DoT heals I’d say they’re tankier than DH by a good margin in large team fights.