So Andarl is certain Deirom is being held in Veil Shalas? That's the largest of the arakkoa settlements that we know of.$B$BVeil Shalas is in the far south of the forest, close to the eastern rim of the Bone Wastes. Unfortunately, I don't have much information on it, but there is an Explorers' League member camped down there who may be able to help you. Prospector Balmoral's camp is perched on the very edge of the land to the southwest of Veil Shalas. Consult him before making any move against the arakkoa.