Lately, my guitar teacher (Mick) has been working on some synthetic scales with me. These scales combine a mode for the first two strings, the overlapping pentatonic major scale for the next two strings, and the previous mode for the final two strings. The last restriction is that we restrict the synthetic scale to four frets.
The tone for the 3 that Mick has taught me are really nice and I created one more that I added to the bottom with the hopes that it fits well into the scheme.
Here is the link to the file with the scales. I have also been using these scales to practice my counting which has added some additional interest.