User blog comment:Deshiba/Case study; Mana Regeneration./@comment-5266525-20140920191725

"We all know about the existence of Essence Reaver item.png Essence Reaver which translates to 2-8% of your DPS depending on your mana. That might not seem like a lot, but it's 10-40% of your DP5S."

This is wrong. It's Damage Per Second - the percentage doesn't change regardless of the time window you choose.