WoE stagger

[Avidon]

In WoE you can stagger the bosses, does this work in the same manner of Abyssea or New Dyna? Will Grellow staggers increase item drop rate? Any Info would be great!
Also... What the hell am I suppose to do with all the other coins I get? I swear some are more common than others :/

[Kristal]

Unfortunately, you can't do anything with those coins. Not even mule them. Might hold onto some of them, if you plan to level a job and more grueling NM camps for their weapons. Coins of Ruin can be safely tossed, they serve no purpose.

[Avidon]

Maybe SE will also let us exchange any 3 coins for 1 coin of our choosing. In either case my main question is if there is a manner of proccing in WoE that will yield more coins.