yea. I think originally he was path of the assassin-> in fitting with the Urxen's current traits.
I could still see him as a warrior/defender though. Especially since at first he was a Warlord before he was a Beastlord (at least in name, iirc)
--> if warrior has traits that give army buffs, then probably warrior 
(although defender is nice because it lets him be more likely to survive to get near a beast so that he can convert it ... assuming thats the way it works of course, haven't used a beast lord yet/ in a long time)