Talk:Banshee Chorus Helmet/@comment-89.47.104.204-20161024151220/@comment-67.11.163.74-20161026071028

Once you hit 200% efficiency, no matter how short a duration you have, you'll still get full (175%) efficiency for Resonating Quake, or really, any channeled ability. You'll need both efficiency mods maxed out and the Arcane Chorus helmet to do so though.