I'm running every dungeon at least once myself, especially when leveling a new role, after it gets unlocked - not only does it help if I get it on roulette sometime, with the guaranteed drops it helps gear up painlessly too. That being said, sadly I know a lot of people going through 60-69 on Shire only (not always augmented, even), though I think worst I've seen was a level 59 astrologian with the lvl 30 weapon you get after unlocking the class. Paaaaainful run. Got me always double-checking if my gear's at least more or less up to date for the content; don't want to bring that kind of pain on anyone haha.