Here are a few tips for combining boring with other embroidery techniques...
Typically you will want to combine boring holes with other stitch types and effects such as Stemstitch, Contour, and Motif Run.
String stitch can also be used to good effect with borer designs as custom motif runs.
If your machine supports it, you can combine boring with cording or tape embroidery. You may also be able to combine borer holes with appliqué objects such as floral motifs.