Considering it deals damage back, its ridiculous CD, i dont see this posing as much Viability as Sacrificial Pact.
I would like this changed to a 2 min CD, for it to be an option for me to use. Sure it prevents all damage for 8 seconds, but that just doesn't appeal to me.
Increase the duration to 12 seconds, or reduce the CD by 1 minute.
Maybe im just being stupid, but 1 min CD on Sac pact, vs 3 min on DB.
Just doesn't make me say man this is a hard choice. Which is how blizzard wants it to be, as stated.