The Fyr'alath Legendary was buffed again in a hotfix!
As mentioned in our previous writeup on the Legendary, there was a problem with how it played in AoE.
This hotfix seemed to occur sometime yesterday evening for NA.
This means that on large AoE situations, the Fyr'alath Legendary can do much more damage now since it can stack higher by consuming more Mark of Fyr'alaths.