Well, there's also the 72% Deadly Strike, 10% Open Wounds, synergized Zeal, and there's all that elemental damage (okay, so not much fire damage against Diablo and not much lightning damage against Mephisto, but still, those level 30 auras have to count for something, right?) in addition to the physical damage. Mightn't all that be able to outrace their hideous regeneration rates?Yea, Life Tap and Zeal with a decent Sacrifice synergy and Conviction will keep your red bubble full. That's not the issue. The issue is that once their life gets low CB stops helping and your small damage output might not be enough to overcome their rapid Life Regen rate.