i found a nice layout
basically this has a different combination of "corner" dice for each bucket, and then dice on four sides for rolling. bucket 1 has 4, 1, 2 ,3. bucket 2 has 1, 4, 3, 6. bucket 3 has 2, 3, 5, 4. bucket 4 has 3, 6, 4, 1. the only corner dice used by all buckets is the middle one with 3. if your wondering why the corner dice are important, thats because i enabled two of a kind