Originally Posted by
Rivin
Why make the claim if you don't have any data to support it? Just checking MoP bosses, none of the end-raid bosses (Will of the Emperor, Grand Empress Shek'zeer, Sha of Fear, or Lei Shen) were nerfed (at all) prior to being defeated on heroic. Similarly, none of the other Cataclysm end-raid bosses (Nefarian, Cho'gall, Al'akir, or Madness of Deathwing) were nerfed prior to being defeated on heroic. Ragnaros is the single outlier any time within the past few years. Therefore your claim appears to be false.