Head to ( -240, -112, -350 ) Copy/waypoint -240, -112, -350 near the southwest corner of The Sinking Sands and click the cage there. You may need to kill the guards for the cage to become clickable.
Discover the Main Camp ( -376, -117, -654 ) Copy/waypoint -375.85, -117.00, -653.85 for update
Rescue the Captive Merchant on the island in the Alliz Raef Oasis (near twin tears ( -508, -133, -790 ) Copy/waypoint -508, -133, -790).
When you hail him four solo Alliz Raef will spawn. Kill them and hail him again.
Escort the Captive Merchant to Mahir Lu'ay for coin and faction.
The only current solution to resolving the bug where the lizard men don't spawn upon hailing the captive merchant is to wait for a server reset. You do not have to delete the quest for it to unbug.