Got a greater rune from Granitesmash this morning(12.Dez 04). Killed him 8 times today, dropped everytime the earring and got 6 runes ( 2 minor, 1 lesser, 2 normal, 1 greater ). Still trying to get the 10 AC augment, but this thing must be his rare drop. Very easy camp, killed him with two people, 70 Pally and 70 Necro was enough, but always start with a dispell to get rid of his haste buff.
Edit: Short update, I have spent again some more days here and after 20 various 66-68 runes I was not able to see another greater rune dropping. 69 runes are dropping, but very very rare.
This is a good mob to camp if you are looking to collect some runes. First off, he is easy to get to . He is on the hillside on the way to the warrior epic area. Secondly ,he is an easy kill. With a slower and a cleric, and myself (paladin) we have no trouble killing him. He spawns about every 16-20 minutes, and i have seen him drop Greater runes a couple times now (altho never a glowing). He also has a chance to drop some very nice loot , including the earring, runes, and the stone of ire. His PH's are usually a baleful stoneworker or transmuted stoneworker . Normally this mob can be camped along with the Dragorn Labourer near the statue. There are Nocs and Dragorns that roam the path between the two , but they are easy enough to single pull, and have a long enough respawn time that you should easily be able to clear both named/ph's in a cycle.