It is probably just me, but..

[Foo01]

I do Duty Roulette main scenario as tank or healer. I do that to make sure that the first timers get to see their cut scenes. More often than not there is no one new (28 of the last 30 runs or so) and it goes plenty quick and get more myths than duty roulette low-level it seems. Actually took like over 30 tries before I got actually run thru Praetorium without some clown trying to start the bosses while people were watching the cut scenes and actually got to play thru it like it was intended and saw the flow of the whole thing. The first-timers were all happy to have seen all the bits they could see and they were like completely in awe of all the stuff they were seeing for the first time and making all sorts of happy ooh and aah comments and such.

So if you don't want to Totorak one more time, try main scenario and if you have the fortune of helping a first-timer do make sure that they get to see the cutscenes.