A Roulette for CT would fix this. They have a Main Scenario Roulette that only has two dungeons in it, so why not a Crystal Tower Roulette for the 3?Have it give the same amount of exp as Main Scenario would at the end, since, as far as I know, monsters in CT don't give exp. Not only that, but the same could go for a Coil Roulette. Would be a little bit harder, so why not make the rewards just as satisfying?