I didn't see it posted and thought I would add this general knowledge in case some are having a hard time with the DoD spell arcs.
You can shroud the group down to 65 and you get a much easier task. After you get the task unshroud. Works like the halloween tasks and such, just make sure the whole group is lvl 65. I hear the group avg lvl has to be under 68.
The rewards though are different than those listed here. We just did 69.2 and got , , and chest was . Also, there is no easy/hard selection only one version but it is considerably easier that normal task.
I don't think it gives progression as I think for that you need to do over lvl 68 group avg ones. But since they are easy they might provide some upgrades to someone.