So, to my dear Sarlonian wizzards...
Wail in Shroud Part 4: let's talk. I believe we need an intervention.
Wail in part 4 is bad, super bad: As in, "omg I could have mowed the lawn instead of done this" bad or "now I have to tell the girlfriend dinner will be late" bad, or " was that really the end boss for borderlands" bad.
You see, each of those nice little green devils? The big ugly ones with the bad dental hygiene? Each time they die they spawn blades that, ala Aliens, pop out of them and do all sorts of terrible damage to those around the now dead devil. In normal we can ignore this and go about our killing, in hard and elite not so much. Your wail, because you are so super über, kills all of them, spawning dozens and dozens of blades.
Yay! Wait. No. Thats awful, because a couple people are dead and no ones ready for harry.
Cast disco ball! Cast hold! Otherwise sit back, relax, have a cigar. You get to shine against Harry, but let the melees have their fun. Don't cast wail. Particularly when the raid leader says: hey, wizzards, don't cast wail, thanks. Let them be killed one at a time and wait the 20 seconds for the blades to disappear.
Otherwise I'm a gonna just start spamming judgement on y'all in part 2 and be done with it.