If you mean the number of levels between each party member, there was never a hard "rule" persay on that, other than that it better not turn into a leeching session where the lower levels sit back not risking anything while the upper levels do all the work. There also must be a good bit of RP for these people to be grouping together for it to work. Like if there's a Toranite paladin running around helping out a NE Corathite cleric... well there are problems with that. A toranite helping out younger toranites though, or helping protect some lower level people do some intro quests isn't bad. Bear in mind that the function of the World Leaders are to help guide newer players get their bearings in the world, so it's not totally unheard of to see a lvl 30 helping out a group of sub lvl 8s as they see fit. All that we ask is that you don't run around *powerlevelling* lower players, or bring them to server areas restricted by levels (8+ on Dregar, 17+ on Belinara). With proper RP interaction and making sure that the lower level characters are pulling their weight in a party, the level spread becomes less important. One of my favorite ways to help new players is to take them on a tour around the Mistone Continent, and telling them the History of each of those historical sites witht he explorer flags there. It's more of an informative quest than a kill-crunching-for-xp type, and helps show them the various paths and how to get to the cities, what kinds of monsters there are, etc. That way they have a general idea of where things are and which monsters to avoid, so they'll be better prepared for their own hunting later. I'll also help intro players learn how to craft with Bjorn, mainly because as a Dorandite Defender, that's pretty much his obligation tot he masses, and pleases his god. You won't however see Bjorn taking a hoarde of wee lvl 8s to Firesteep, where they would level at every 2nd spawn!