Speak with Dorl in hut near Guld, ( -1131, 28, 1407 ) Copy/waypoint -1131, 28, 1407 to receive 3 x pygmy spear-walls.
Build the first piece of pygmy spear wall ( -1276, 25, 1457 ) Copy/waypoint -1276, 25, 1457 killing any Allu'thoans along the way.
Build the second piece of pygmy spear wall ( -1425, 49, 1364 ) Copy/waypoint -1425, 49, 1364
Build the third piece of pygmy spear wall ( -1408, 93, 1100 ) Copy/waypoint -1408, 93, 1100
Continue North on that path in search of Captain Greymast until you come across two Allu'thoa landhunters (101 heroic) standing over Corrith Midner ( -1306, 135, 1040 ) Copy/waypoint -1306, 135, 1040. Defeat them.