Got a couple of these in arena tonight - group of three: 64 monk, 65 chanter (both me, dual boxed), 51 shammy guildee for heals. Mobs went down fast and easy. Had a couple others who joined in for faction on and off, but even with just the 3 of us it wasn't too hard. Strangely enough, both of these fell off the same mob a few spawn cycles apart... not sure if that's significant or just a coincidence though. Was the one up on the left platform out in front of PoZ/Ice Wall.
Can confirm that this DOES have the summon: pouch of quellious effect on it. Very nice effect, good for swap in.