He gates when low on health, around 20-30%. Did it twice on me while trying to kite him around the square courtyeard. He does not summon like the other guards do around there though...ouch. I am going to try hunting elswhere.
You have slain Centurion Renardio! Your faction standing with Validus Custodus got worse. Your faction standing with Katta Castellum Citizens got worse. Your faction standing with Magus Conlegium got worse. Your faction standing with Nathyn Illuminious got better. Your faction standing with Coterie of the Eternal Night got better. Your faction standing with Seru got better. Your faction standing with Hand of Seru got better. Your faction standing with Eye of Seru got better. Your faction standing with Hand Legionnaries got better.