I've been trying to get the Zhaval coffer key for the last few days with no luck. I'm at the right place, down one of the four wells on the first level fighting Airhmans, Blood Demons, Doom Demons, and the like, but I can't get the key to drop. I have the Surcoat quest activated for PLD, but fought for 3 hours as RDM/BLM with no drop. I then switched sub to /THF, thinking that it would help the drop with Treasurefinder, but camped the area for two and a half hours with no drop. Am I doing something wrong, or is this an EXREMEMLY RARE drop?