User blog comment:Willbachbakal/(Item Concept) Revamping Life Steal/@comment-24036535-20150825040230/@comment-1330314-20150825221833

Fair enough, but the sustain on ER applies per instance of damage dealt, which would treat AoE and single-target damage in the same way. His DoT would heal him with each tick, but otherwise you'd heal for much more with when autoattacking multiple enemies at once in most circumstances. ER would be far better when taking down single targets, but otherwise Hydra alone would be sufficient against multiple enemies.