Anything that drops from Grachnist, other than the Iksar Scaled Gloves, is a treat. These leggings dropped for me, along with the gloves. Nothing special about Grachnist. He was sitting in the goblin fort minding his business. I took advantage of the situation. Ive killed him (solo) about ten times in the past two weeks (level 35-37 druid: Drops include that wonderful goblin earring and the leggings. Im still looking for that wisdom idol. Wish me luck.
Take care; Be safe.