Killed this guy 4 times tonight. First time he had the cloak and a Glowing muramite rune. Next time he had just cloak. Then he had the legs and a lesser muramite rune, and finally he dropped the legs and a regular muramite rune. so this mob does definately drop runes fyi
did him for 7 hour straight, got 11 cloaks... the only time ever he spawned 2 times in a row (3 times for me actually) all three times it was the crappy cloak... So utterly annoying, god I hate the RNG.
I farmed another mob for my Feran Hide Leggings. I would easily say I spent many more than 7 hours to get them to drop.
Camped it roughly 5 days, over a period of 2 weeks. Dunno how many hours I spent on it, but way more than 7.
But, like anything, eventually it will drop.
I camped it once, for 2 hours a week later with a beastlord friend, and they dropped on the first kill. Over the next 3 hours, 3 more runes dropped. So most of the group got something out of the camp.