For those who have yet to complete this mission on the asmo side here is a quick way of getting around the bug.
Bug: When trying to activate the bone pile to call out the spirit the mouse icon has a line through it.
Fix: Change off the channel and go up to Ch. 4 or 5
Notes: When you prepare to change the channel get to a spot that has no birds patrolling around (especially if your a spiritmaster like me). Change channels and recall your spirit or pet before proceeding back to the bone pile. Before clicking on the pile, make sure the area is clear of the birds (they aggro very easily) and confirm that the line through the mouse icon is gone. If you die then you cannot call out the spirit again, possibly has a fail timer or its another bug. I abandoned the quest shortly after trying again, but was too tired to go back and get the quest again.