No no no, expert roulette is run constantly. Thousands upon thousands of people run it daily for tomes(its one of the best sources for capped tomes). You get one of the most current dungeons, all of which are easy enough(and you become familiar with them super quick), and you get 1/5th of the tomes you need to cap the week. The roulette that doesnt exist is the "Extreme Primal" Roulette(or the savage raid for that matter). As has been said repeatedly, the (ex) and higher level fights require a degree of party coordination and cohesion 2 steps above anything that shows up in any roulette. Even when theyre current, getting PuGs that can clear them is a crap shoot at best. No longer current (ex) fights have that same relative difficulty, but with a reward that is no longer a fair trade for the time and effort involved.