A guild group was there for five+ hours yesterday and killed Rockcrusher four times. He dropped the aug every time. No ring. Gotta love the random number generator.
Having hunted this guy on and off for the best part of the month, I've found the following:
Any static mob around a tower outside is a PH, be it turtle, regrua, hraqui or sea dredger.
The aug is definitely the rare drop, took 11 kills to get mine and 5 for a friend. Magelo (as of the 10th April 07) reports a 3 of 27 drop rate, ie 1 in 9 chance.
If you're camping this guy it's best to check out all the static spawns first in the "outside" area of the zone, as he might already be up. Furthermore, Muckdiver shares the same PHs, so if you're soloing the aug and Muckdiver pops it's best to leave him up, as it's one less option available when respawns come along.
Bearing in mind the large number of PHs, if the popular camps (SW corner, temple entrance) are taken there's still a chance of popping him elsewhere.
Restrictions - Slot - EAR HEAD FACE NECK SHOULDERS ARMS BACK WRIST HANDS FINGERS CHEST LEGS FEET WAIST Recommeded Level of 70. Required level of 65. Class: ALL Race: ALL
Rockcrusher does not appear to have a static spawn point, just in the sw corner of zone along the water near the towers. Even con to lvl 75 every spawn