I don't think there's a guide yet, at least not one that I know of. I suggest soloing for the first couple of floors until you get acquainted to the way it works. When working with a team I advise to not have a large dungeon size unless you're doing a speed run. You do not get enough of an xp bonus for all of the extra time it will take (I had a large dungeon that had 52 rooms, and we didn't even unlock every door). However I digress, these are tendencies that work for me, and I don't know what the best xp rate is since the skill just came out. Also, when you get to the point where you have to repeat floors because you haven't unlocked the next one yet, reset prestige and start floors over so you can get a steady score in that.