This line is meant for a static C7, meaning in a situation where C Dominant 7 is heard as the tonality. We generally see that as Mixolydian and is the basis of a blues tonality. In addition to C Mixolydian scale and C7 arpeggios shapes I am also using the Minor 3rd (Eb) and Augmented 4th (F#). I use those notes to create tension against the adjacent chord tone.
An added challenge is playing continuous lines that are longer than four bars.
