I was worried about this fight given the description from these posts, but easily defeated it on my Mesmer: no fancy tricks, just full Berserker Domination/Dueling/Illusions (2/2/1; 1/X/1; 1/2/1) with iBerserkers, Mantra of Distraction, and Signet of Domination. I was surprised by how little HP the thing had compared to other PoF story bosses.