So perfect world has lots of random chests randomly around the map. Almost all of them require a key to open them, which normally you can't get ingame. Typically the chests give random crap (ex. http://www.pwdatabase.com/pwi/mine/4308)
my idea is to take all these chests and edit what they give. Was thinking leveled shards, mats and maybe refine orbs. To make this work smoothly the repspawn rate of the chest would need to be short and the limiting factor would be how many keys you get. This can be done with quests or maybe having vote tokens make them only. I think this would help create more variety on how to get select items and getting the chests could be somewhat difficult. some of the higher end chests are only in FB caves on alternate routes.