Destroy the first Barrier of Bones ( 4013, -1103, 2265 ) /waypoint 4013, -1103, 2265
A group of two to three rotting othmir bonefiends and a decrepit othmir bonemelder will spawn periodically. The bonemelder heals the Barrier of Bones for 100K health if it isn't dropped quickly. The Barrier of Bones continually regenerates while any othmir is up - it seems the more othmir are up, the faster the Barrier regenerates. These groups of othmirs spawn continuously, and a high amount of DPS is going to be needed to burn them down before they regenerate the Barrier of Bone faster than you can destroy it.
Destory the second Barrier of Bones ( 4015, -1115, 2326 ) /waypoint 4015, -1115, 2326 - same deal as before
Destroy the third Barrier of Bones ( 4097, -1116, 2338 ) /waypoint 4097, -1116, 2338 - same deal as before