Best place to farm ores/herbs?

I like running back and forth between the Sky and Cloud Terraces in Ludi. There is a room for every herb/ore vein you need. It makes getting Black/Purple veins a breeze, since there are 3 of those rooms.

I find Heartstones and Golden Flowers all the time, too.

I like this. There's also all the Master Robo maps nearby for Bronze for earring spam. Thanks!