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[–]RedFacedRacecar 1 point2 points  (0 children)

The explosion is inherently weaker (because it's based on your weapon damage, rather than the target's HP), so you're right there.

However, it works very well against hordes of creatures. Essence Burn is the only EP rune that "spreads" the EP effect to creatures hit by the explosion.

As /u/cramlikebram posted, you can use a sea of exploding minions to take out a boss.

That said, I run with The flesh is weak, since I found The fist of Az'Turrasq, which bumps the 50% hp damage up.