Yeah, Valkurm and Altepa ramp up the difficulty by decreasing the number of digs, while Bubu and Elshimo ramp up the difficulty by widening the radius in which you'll find the treasure.
I have to say again, Treasure Finder is really helpful for the increased radius locations. In Buburimu, I almost always found the location by dig 4 or 5, and usually on dig 3. I suppose Bore or Burrow would be much better for the decreased digs locations, since even if you find the treasure quickly, you could get boned by not having enough time to REACH the treasure.
I don't want to imagine trying to do the harder locations without having some kind of special ability to help you out.And I'm torn between starting towards Valkurm/Altepa, and continuing to try my luck on Elshimo. Free random furnishings are nice (my mules will all have tastefully decorated homes!)
XI Wiki

