It's the in advance part that worries me. Let's say I queue for roulette, as soon as I jump into the dungeon/raid/trial I have to know straight away what kind damage the mobs/bosses do and when they do it to try and figure out what song to play first and the rest in what order so it fits in when the most damage is going out. And I need to figure it out right away or else I poo up my dps.

Now, it would be super simple if we could play the same song over and over but we can't. So if I land in a dungeon where the second boss does a heck ton of magic damage I need to figure out how long it'll take until we get there so the specific song is available then. There's a lot of dungeons, and a lot of bosses to memorize. @_@