Blizzard
We've just made changes to the Soulrender Dormazain encounter, aimed to smooth out unreasonable damage spikes that could come from Unleashed Tyranny on Mythic difficulty combining with Echoing Screams ticks.
Unleashed Tyranny damage is reduced by 17% on Mythic difficulty.
Echoing Screams now ticks every 2 seconds (was 5 seconds) on all difficulties, with damage proportionally reduced on Normal, Heroic, and Raid Finder difficulties to keep total damage over time unchanged.
Finally, Echoing Screams damage was reduced by an additional 10% on Mythic difficulty.