Just killed these in Bloodfields zone - there are 3 up at all times. Blue con to 63. Immune to Mezz, Snare, Root, and he rampages alot. Slow sticks, but like many Omens mobs, it's partial success only. Cripple lands as well, as did chanter Asphixiate DoT. High MR, as my nukes after tash were doing partial damage. Some were outright resisted. Hits into the mid/high 700's normally, 785 max I believe. Summons as well. Basically a typical WoS mob in Bloodfields.
After killing 2, message appeared - A massive girplan devourer emerges nearby to challenge those who have destroyed it's kind.
Oddly enough, we were unable to find him, though he seems to have spawned beyond the Sentries of Ikaav.
Clearing stuff under the bridge and our monk brought one for fun. Our warrior has 9k hps and we did pretty well, even with a wandering Noc add. Chanter was able to slow him. Resisted my Immolation of Ro once (with a -30FR check) but I was able to blast fire after that. Didn't drop anything. Didn't flurry but did rampage and summon.
Hit for around the 700's or so, can flurry and he summons. Not sure if he can Harmtouch or something because the BL's warder was the first hit and fully buffed was at 10 percent instantly. We will be heading back for revenge kill after we add a few more to group =)