Something to consider.

Between S-E devs' insistence on filling raid content with mechanics that don't allow for recovery and elitists driving people out of endgame entirely because they make the SLIGHTEST of mistakes (You mean we aren't playing with bots who know the fights inside-out?), there really is a need for some practice scenarios people can run through on their own time without some jerk causing blood pressure spikes.

An arena that can simulate raids (Ravana, Bismarck, Alexander, for example) and the mechanics that lie within would certainly be welcome, especially if the Ironworks crew offered advice along the way.