Hunts and beast tribe quests give a good chunk of daily exp, throw in a few fates for that sweet challenge log bonus, can knock them out waiting on roulettes or queues. Standard dungeons give good exp and keep your gear on par too, esp if you have exp buffs like squadron exp scrolls, food and fc bonuses. If you wanna make dungeons fast, put up pf, can usually find a few ppl to run them through a few times at least.

Avoid PotD after 60, wait for HoH if you wanna go that route, to me PotD got super boring super fast so I am expecting that of HoH too. Dungeons and hunts at least can shake things up a little.