Well, how did you think I gathered the funds I've got sitting in that trade for you, waiting for enough to accumulate that I can start buying your old knuffel?
It's going to take me forever, but I'm determined.
The ones I dig with are the ones I name "Z something" so I can find them easy by clicking on the "ready to dig" and "names descending" sorters.
They're all at level 100, they all have their stats spread evenly (so 19 in each) and they all have ChipChip fountains, and I dig in the water area with them. So I get a lot of

that way.
I suppose it would be better if I put all the points somewhere besides water and dug in water, but I wanted them ready to dig anywhere because someday there'll be an item for each area, and eventually I'll equip them all with all of those, so it won't matter.
(It's taking a while to get all the lightning bug jars and fortune teller dark orbs equipped right now, so who knows how long that will take)