Soloed this guy a few nights ago. Gotta play stun and hit game with him to keep him from restoring himself, with good enough timing you can bring him down with a little skill. )
Found one of these roaming the frontyard last night (the day after the patch). Don't know if it was a bug or verant decided MM wasn't bad enough. It's healer/caster like the warder & custodian but seemed a bit tougher, actually ALL the spawns in the gy were tougher last night including the fams.
Man that bad boy spawns real close to MM entrance now. We were pulling fammies and he pops right behind us next to the ent and starts beating the crap out of us. We bailed and went back, he was gone. We pulled fammies again, killed 2, pulled 2 more and pop; he's right behind us again. We bailed again. This time we pulled 1 fammie, killed it and waited. He popped again and this time we took care of him. I don't have a clue as to where he comes from, but like some of the guards maybe he's coming through the ent, I dunno. But he's a mean SOB, drops a couple plat and fine steel.