Been hunting these again with diff toons this time. After about 20 hours this go around, they are all lvl 72-74 except for ONE. That one always spawns just east north east of the building entrance to Frostcrypt. When I was lvl 75 I could see that it was the only one that was white-con and all the rest were blue cons.
Which leads me to believe that this one is the PH for The Void. But I wont swear to it. Its just odd that only one of them were lvl 75 and all the rest were 72-74.
Been rotting these for awhile in Valdeholm, west of the FC zone-in. Only had one summon, it was one I pulled from just to the east of FC (behind it)
From my DoT log, these seem to have about 70k hp or so.
They are NOT social with the spiders, and are all indifferent. I can sit in the middle of them and rot spiders. They are social amongst themselves though, and spiders will join as well.
I have been seeing crazy aggro from these though when they re-pop. More than once, while engaged with one, another has come waaaay outside of normal aggro range to join the fray. These have always come "running" directly at me. Sometimes when resting, one will pop, come running and sit right on top of me for a minute, then walk away.