In the beginning you design your face all that. And then you and a few other people ,maybe three max, decide on the level of the dungeon, the difficulty and how much money they want to have to buy stuff with (i.e. spells, magic armor, weapons) . And then the people get to level up their skills and perks according to the level they set. Beth would have to make custom dungeons for this and then people would find more (possibly better items) as they went through and finally fight the boss and exit.
I can't think of a good way to allow carry over as the dungeon would be the only game play part and there would be not taverns or anything lounge with people actually walking around. You'd just set up a game with your friends and then do dungeons.

