The regular problem with all these "one pro against 7 noobs but the pro must deal with drunk daut farting in the same room" -type challenges seems to be that you first calculate for 30 minutes what is the optimal balanced noob/pro -ratio, and then you start the game and realize that you got it wrong anyway.
Also, dont make it too Daut (if he qualifies) or TheViper/jordan -heavy, which always excludes some players to some extent (mainly those who are not DauT (if he qualifies) or other Secret). KotH or a micromania tourney sound good ideas to me.
Perhaps at RBTV, there could be a randomised identity round (i.e. all the names are "smurfs"), 6 player FFA (KoTH, or other settings if more interesting) and at the end, the casters have to guess which player was which.