Well, first time I tried to get Coffer Key, I went with a BLM and did the ol' nuke and sleep routine. For about two hours nothing dropped >.> . Anyways, gave up, said goodbye and thanks to BLM for the help and took a huge break from trying to get it. About two months later, I try again with the help of a NIN and WHM. The key just dropped like crazy. Under ten minutes, 2 drops. I thank them and decide to hunt the Treasure Coffer on my own since it's simple. It took me two nights but I got the Old Gauntlets.
Now, for Dark Spark. Too easy, got help from a 75war/nin and 56war/nin (he needed his gloves too). Gave them Minuet + March and I sit out the battle. Battle was over without a Explosion {whew!}.
I got my gloves and I'm happy. Finally got my full AF for brd.