You can access the Cave of Knowlege by gaining ally faction with the Ashens. Now this zone is filled with Heroic mobs, some Nameds (not always there) and three quests that are done very quickly. I have cleaned the place a couple of times. The chest drop rate is dreadful (only once every 60-75 mobs) and you can only get wood... Has the loot table been looked into since LU#17 ?
I have seen no change there, been 2 times since last update. First time same old wood and junk, second time no named, nothing. Sure its only got a 24 hour lockout timer, which means this zone is purely for the Ashen Order quest, joy~
I have been in Caves of Knowledge about every other day, and havent gotten anything better than some treasured junk.