Watch the Playing In Position: Phrygian online guitar lesson by Robbie Calvo from Power Play: Minor
Your assignment is to improvise in position over one complete sequence of the 4 Phrygian keys. Once you have played through one complete sequence of four keys, shift up to the next scale pattern of the Phrygian mode and improvise in position there for one complete sequence. Repeat this process until the track fades out. As an FYI, there are 4 complete sequences. This equates to about 6 minutes of focused playing time. After completing one full track of improvising I suggest you take a break to re-focus.