Update: Rift 1.8 Hotfix 14

INFERNAL DAWN: MAELFORGE

 * Flamebound Devils no longer cast Concussive Blast.
 * Flamebound Ifrits no longer cast Burning Flesh.
 * Increased the time between Flamebound minion spawns.
 * Reduced the health of Flamebound minions.
 * Increased the melee damage buff provided by Blade of the Inferno, and increased its duration.
 * Blade of the Inferno now increases damage against Flamebound minions as well as against Maelforge.
 * Disabled Concussive Splash in the final Maelforge encounter. This was active in testing but disabled before the Maelforge fight went live - so returning it to that inactive state.
 * Fixed Devastating Sacrifice not applying the right amount of damage increase.

Source

 * http://forums.riftgame.com/official-rift-news/patch-notes/321675-rift-1-8-hotfix-14-8-00am-pdt-6-20-12-na-1-00am-gmt-2-00am-bst-21-6-12-eu.html