It's not "hard" per se. All a pattern, fairly straightforward.
What makes it artificially hard is the fact that what you see on your screen is basically a lie, and if you live overseas from the servers, then you have to have it memorized and be lucky that you don't get things like 3 plumes stacked on you when you heal or dps so you don't get randomly killed by lag rather than by your own mistakes.
I bet if the lag weren't there, and people would actually dodge things the way it looks like on their screens, then everybody who's run this several times would find it an incredibly easy fight.
