De-aging Fruits

Just curious:

Where do you prefer to go to collect de-aging fruits?

The Youth Fruit Dungeon right before leveling up to fit in more runs per key. 

its not gonna be that simple edward de aging fruits gives 300 exp now thats REALLY low so if you are like at least 900 exp away from levelup then its good thing but u gotta set up your exp that way to even do it