First half of the Wurmbone Key: ( -321, -145, -320 ) Copy/waypoint -321, -145, -320 in the back of Pyre's room. (Unsure of strategy other than hit hard and fast. Pyre spawns adds every 25%, which must be dealt with - blue and green AEs are suggested.)
Second half of the Wurmbone Key: ( -321, -145, 139 ) Copy/waypoint -321, -145, 139 in the back of Frost's room. (Get him to damage a pillar and then keep hitting that one until it falls, he is nearly invincible until then.)
Map: ( -580, -118, -89 ) Copy/waypoint -580, -118, -89 at the Forgotten Statue's feet. (If you avoid stepping in the circle, he won't attack you.)
Return to the Duality in Feerrott.
Take a druid ring to Jarsath Wastes (via Kylong Plains). (Once you're there, find Erus Dal'viv ( -757, -50, 1900 ) Copy/waypoint -757, -50, 1900 on a ship off shore from Danak Shipyard. If you do not have a flying mount, you can go the long way through the cave at ( -850, 274, 1189 ) Copy/waypoint -850, 274, 1189, then through the underwater tunnel and swim to the ship.)
Head east to ( -1125, 124, 2004 ) Copy/waypoint -1125, 124, 2004. Enter the cave and take the right fork then zone into Wurmbone Crag (Advanced Solo). (You have to kill all the named in here, no skipping.)
Speak to Erus in Jarsath. He is on a large purple masted galleon in the bay near the Wurmbone instances.
Zone into Wurmbone's End (Advanced Solo) via the left fork of the tunnel in Jarsath. ( -1199, 125, 2021 ) Copy/waypoint -1199, 125, 2021(as of 1/31/2013 you must kill at least the third and fourth names to spawn Prime Magnate Mrelg)
First Piece: Click on the Ancient Stone Icon at ( -315, -9, -334 ) Copy/waypoint -315, -9, -334(It is near the Shissar statues; out of aggro range of the named.)
Second Piece: Kill Prime Magnate Mrelg around ( 647, -159, -499 ) Copy/waypoint 647, -159, -499.
Head back into the cave between the water and Skyfire Mountains. The quest will update for finding Chelsith at ( -823, -56, 1215 ) Copy/waypoint -823, -56, 1215.
Monolith: Kill Murmaz the Believer at ( 483, -17, -460 ) Copy/waypoint 483, -17, -460. (You can skip all the other named easily. Each one requires a trigger item from another named in the zone.)
Item of Interest: Step onto the blue sparkles in front of the door at ( 746, -136, -523 ) Copy/waypoint 746, -136, -523in the Resonance Chamber.