I finally got this lazy gnome to show up to work so I could get the hunter credit. He spawned at -1048, -1141, next to a siege device closer to the Beza/Zeka zone devices. I was originally killing west of there because the picture above shows the big platforms in the background as well as the map pack I downloaded showed this mob as a static spawn next to a siege device on the west side of the group. After a couple of weeks of clearing every day, I finally started killing all of the small groups that congregate next to the siege devices. I'm guessing that he can spawn in any of the groups.
Hits around 5k, no ramp or flurry that I saw. Had AE Wall Breaker that he cast every 3-10 seconds for about 4500. Low hp, we managed to get him to 90 before we got pwned, but definately seems like a raid mob.
Update - got another group to come with from guild last night and we managed to kill him on our 5th try. Way too hard for the loot he drops imo.
Killed him with a group of 76-79: warrior, enchanter, monk, rogue, druid, healer merc; not a raid mob ;p Monk phantomed one of the mobs near him so it was a 3 pull, enchanter mezzed the mender + mechanic, squad beat up the named. Yeah the AE is freakishly annoying and powerful, but A5 healer merc kept us up.