PH is "a Skeleton" which respawn timer seems to be about every 10mins. Be prepared to sit through 3-6 PH's before Bonelord Spawns. For those who do not understand the locations posted, I found the best place to sit and wait was on the second rock to the left when your facing the ZL to Oceangreen Village.
Edited, Nov 2nd 2013 1:16pm by dragonarc