I've only aggroed this bit once so far, and I still had the sense to run away from it in a straight line to deaggro it (as opposed to the many people who run in a circle around the rock, which will pretty much never work because the bit uses ranged attacks...) I didn't even get to within one hit of dying.

I've had much more annoyance with that one Loaghtan (or however it's spelled) around the dark chestnut nodes in Forelands. That thing just won't bugger off...