1.39Suggested exact harmonic skeleton

Try this version:

| C6/9 | G13 | | G13 | C6/9 | | C13 | Fmaj9 | | C/G | A7 Dm9 | G13 | C6/9 |

Then tag:

| Fmaj7 | Fm6 | Dm9 D♭13 | C6/9 |

This is a good balance of familiarity and sophistication.