On Bertox server, the war has been going on for quite some time. We helped the sonic wolves take over the owlbear cave and the grimling camp. From what I have read, they are then supposed to take over the Vah Shir outpost and it is there that we kill the boss for the good drops and reset the zone.
Something I hadn't realised before today, was that with an extended range item you can kill this and not get cast on.
I pulled with ensnare and then rooted and dotted. I got dispelled on the first root, but as long as you keep it rooted after that then it goes down without a problem.
Dropped C