Here are a bunch of coords for dig locations in W1 Z2. With these you can get over 250 baubles in just a min or two.

I got the locations from:

Which has many digging locations for each zone if you want more. There is one dig spot where a +50 bauble spawns behind an

invisible wall and requires use of the whip to get usually. I got it the first time, but couldn't get it to spawn again (I presume it can only be grabbed once) so removed it from this list.

Code:

[Dig 2]
x=-562.4
y=632.38
z=67.06
[Dig 3]
x=-555.77
y=588.86
z=75.9
[Dig 4]
x=-467.85
y=571.4
z=67.15
[Dig 5]
x=-420.91
y=587.62
z=62.4
[Dig 6]
x=-305.35
y=662.54
z=81.88
[Dig 8]
x=-299.09
y=572.19
z=96.84
[Dig 9]
x=-123.92
y=614.49
z=66.69
[Dig 10]
x=-93.45
y=594.5
z=87.63
[Dig 11]
x=-81.1
y=601.57
z=87.63