the only one I found is a rock in Thundering Steppes by the ocean. It is a random spawn somewhere between the gnoll cave near normal zone in and on down that stretch of beach. Despite the patch that claimed it would be farther away from the cave enterance (as in dangerous territory of gnolls) It sometimes is spawned close to them.
The mobs seem to be the same level each time you enter the dungeon, Id estimate they are level 20 to 23ish solo mobs. A word of warning, there is a agression bug in there that will pull some high level adds out of a wall at a certain point almost certainly killing you. It is either the first or second set of Pirates you find that are against a wall. Make sure you pull them to a safe distance, then when your ready for more walk up to that wall and back away so you can pull the hidden mobs. I think this is a bug where they are agressing through the wall. The group and solo version of this zone will do this every time.
Loot wise I got random chests with artisan recipes and the occational merchant trash gear. Not bad for a solo area though. Despite the fact the mobs are grouped together they are solo mobs none the less.
I heard there is one inside the graveyard in TS, however I can't verify that.
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Hi