These things drop some very decent Unique Object drops now (specifically for casters)
Recently Ive picked up:
Fortifying Woven Vest
(AF34, 92%qual 12int 13con 26hp 3%crush)
Fortifying Woven Pants
(AF34, 90%qual 5%crush 6str 19hp 15con)
Insightful Bracer
(89% qual, 18hp 13int 5%energy 7con)
Arcane Cloak
(10con 7qui 6power 3%matter)
And so many focus staves that Ive been burning them (mana + mentalist focus, usually around 35-38levels)
*definately* a nice mob to hunt for mana orientated classes (chanter/mentalist/eld) and Valewalkers.
There are 2 main camps of these..both on the south wall of Moher.
First is in a little grove just up above the Moheran camp (with the ants in). Second is just above Koalinth (with the Megafelids)