We've done analyses and retrospectives on various boss fights for years here at WoW Insider, and as a new raid looms large in patch 5.4, I started thinking about which boss might be considered the most difficult to ever grace World of Warcraft. It's not a simple question to answer, because of the diversity of fights we've seen in WoW over the years, as well as the way the game itself has evolved. I turned to the rest of the WoW Insider team for some opinions on this, and they quickly weighed in with typically interesting and thoughtful opinions. As can be expected with such a subjective topic and a good-sized group of people as the WoW Insider staff, opinions varied on which might be the hardest boss of all. Yet, four names in particular kept popping up.
Matt Rossi: If we're talking "hardest for people in the best gear available to do at the time", then C'thun. They HAD to nerf C'thun before anyone (and I mean anyone) could kill him without exploiting. For a group of level 60's in BWL/AQ gear, pre-Naxx, C'thun was the hardest fight. Not even Naxx fights compared. There has never been a fight tuned that high again.