I know this might be hard to do, but I think that having parties would help the player in the survival server. Now for those of you that don't know, if you are in a party with another player and you get a level up in mining for your mcmmo level, it would give the level to your friend in the party as well. It would not only help people to rank up, but it would also make the experience more exciting.
I think adding another MMO aspect like that would be cool, but I doubt there is a plugin that would be able to do this while working with the other plugins on the server.
Its a part of McMMO, a plugin we already have... The just have it disabled because it can be easily abused and taken advantage of.