Are you trying to find something that's not obviously available in Mercy?  You can't find the player to get a part from?  You want to shake things up with a story idea?  You want to head out into the deadscape on a mission with others?  You want to damage something, repair a big thing, build something that would take considerable resources?  Pretty much anything that can't be had through Roleplay, can be worked out in a story request!  So ask away!