Sorry, can't clue you in on my lucrative krono farm. Git outta here. I'm kidding, I actually haven't bothered to camp a single piece... So IDK where it's dropping now. Historically, a lot of the pieces were random zone drops, with the BP being from the Avatar of Fear, and a few of the more primary pieces from other named... IIRC, anything that drops Ravenscale can drop it, because Ravenscale actually "replaced" it on the drop tables.
IIRC, named mobs drop pieces corresponding to their Ravenscale armor drops. Ritualist drops everything(?) except BP.
Thanks, my friends and I were able to get a bracer the other night although a level 50 of course came in and tried to steal the camp.