Watch the Scales and Arpeggios online guitar lesson by Angus Clark from Focus On: British Metal
In addition to the Blues scale we will add the Dorian and Aeolian scales. I am very specifically adding notes to the minor pentatonic scale fingering in order to create these diatonic modes. This will keep you grounded with the pentatonic scale as your "home base" and keep you from winding up sounding like you are pointlessly playing scalar material.
We're looking at some basic triad arpeggios on the top two or three strings. Nothing too crazy, but very useful stuff for getting this sound together.