In your example, you use E-Phrygian to cover the C Major, E minor, and G Major chords, which belong to the key of C-maj. With this being said, I thought over the chord being played, you should put emphesis on the root of the chord being played, and the other notes that make it unique. So when you say play E-Phrygian over those chords, would you use the scale the same, or would you use the modes of the new key you`re in?
For example:
C-Ionian over C-Major
E-Phrygian over E-minor
G-Mixolydian over G-Major
Is that what you meant by your example, or would your tonal focus always be E-Phrygian, since that was the only example that was given for the three chords?
And if you wanted to play it a different way, you could just stay in the key of G-major, so like my example before?
C-lydian over C-maj
E-Aeolian over E-minor
G-Ionian over G-maj
B-Phrygian over B-minor
If its true, then that clears up most of my confusion!
Thank for all your help!!