This guy is very tough... I Could Malosi and Decay him but none of my dots would stick... ate my pet up at 53 and tried to eat me too!!! Resisted everything I threw at him the SOB!! Finally gave up after having to zone 3 times. Good luck to ye all.
From what I've seen the special mobs for twighlight quests can spawn on any spawn point for the common version of the mob. So this fella could spawn for any Coterie Centurion.
We've camped the legionnaires & centurions @ the forts & the castle - guard did not spawn & none were on track... anyone have any more info on these guys?