I havent played it for five years.
I played for a few months at launch, and took a hiatus till recently when some friends started playing. For all intents and purposes im completely new.
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The only thing I ever used PotD for when leveling my classes, was if I needed a SLIVER of EXP to get to the next level, then I would run a quick 10 floors. Otherwise, all Challenge Log, Roulettes, daily hunts, and running the highest leveled dungeon I had unlocked(not only does it give best EXP outside a roulette, it gives possibly better gear than what you are wearing/GC seals to buy gear/materials/etc)
Don't just spam PoTD constantly or you're going to go insane. Do your roulettes and then hit up the highest level dungeon you can while doing fates waiting for the queue.