I've also been using it a whole lot levelling my Dragoon. I've never had a dungeon after Halatali, and even that was only once. It's always Sastasha, Copperbell and Tam-Tara. It just seems weird that people would stop running dungeons after getting to level 20 as I haven't. I keep on running them after the Roulette is done so I can upgrade my gear for free.