I got Mojo the Tainted to spawn in the exact spawn point location mentioned previously here after many, many kills, I did not keep track of the hours, but he's incredibly rare. I had the ancient cyclops spawn twice in between. Mojo dropped an Elementary Binding Powder and Sunshard Dust.
Camped this mob for about 10-16 hours of active camping over the course of 48 hours. This named does indeed spawn on the northern beach of the south eastern most island. I killed everything on the island in the south east, and the other goblin islands to hopefully increase chances of spawning it. I was generally able to keep 2 islands clear at a time. It did not help one bit from what I noticed. Also had another person say that they spent about 10 hours of active camping during one of the weekends with increased named spawn.
I would recommend if I had to do it again... Set the northern beach as your bind point and just clear it every time you find yourself at bind point.
This is definitely a rare spawn. I cleared all goblins on the island for about 5 hours of non-stop killing over a few days before he popped. He spawned on the north side of the beach where a wandering mob would pop. He was not with any tents, not sure what the actual PH's are as all goblin types seem to spawn in all spots.
Mob isn't level 20. Was red to 17 and dark blue to 37.
Seems to have high MR - thinking it was level 20 I tried to pull it and when 17 druid couldn't land any spells I tried to nuke it down with 37 cleric but got resisted enough times to run out of mana before it died.
loc +351, -6961, -291 which is the north beach of the south eastern isle in the zone.. Placeholder seems to be "an isle goblin shaman" or none at all. Mob is very rare it took me more than 10 hours to make him spawn.
The mobs (goblins) on the isle have very different spawn rates: Beach area: ~ 7 min but some mobs spawn faster, maybe in 5 min Inner area: 2 min 24 sec Hill bay on the south ~ 14 min
Race : Goblin Class : Shaman Level : 35 Gender : Undead Body Type : Humanoid
Drops: Silver Wolf Totem Sunshard Dust Elementary Binding Powder Raw Fine Runic Hide Thick Silk Iridium Ore
Playing on Lockjaw Prog server where this mob spawned on the Lower level Green Gobby Island straight out from the dock on Sister Island.
He cast some form of Root, Dots, and was Healing himself... Wiped the group I was in 4 times. Even with 20% rezzes, most of us de-leveled. We were a mix of 22 to 23 level and he was RED con to all of us. I highly doubt he was 20th level...
As I get more level and more ability, I will go back and Crush him. But for now he has won his Island. "I Shall Return!"