OK Kids here is the run down... Did the same for the Velium Hunter
I've been tracking these little buggers for a few weeks now with invis on and Its taken me past the Kobold camp and past the Lord Pit(miniboss of zone) camp. Youll come around and see a "stone tower" to the right of the Lord's pitt which takes you up even higher into the zone. I have died 3x trying to get my self to even see 1 of these guys along with the wrest of the Velium Family and cant get into the front door of that tower as a few things can start to see thorugh Super Camo.
I believe to get to these guys you will need a solid grp @ least 55 and higher to get a glimpse. I was in there with a 65 Mage and 2 of us ranjas lvl 55 and 58 and still couldnt get a look. Died b4 we got close to the front door.
CAUTION: dont go near the Lord Pitt there is a dispell field.
ps: these things were never even close to the frenzy camp... but you can see the location of the stone tower from the frenzy camp, past the 2 ice dragon statues!

Chipped Onyx Sapphire
Crushed Black Marble
Crystalline Silk Thread
Flawed Emerald
Flawed Sea Sapphire
Flawed Topaz
Imperfect Diamond
Jaundice Gem
Nephrite
Song: Melody of Ervaj