IamGroot

There is a saying that music theory is a tool to assist us when we have problems understanding what we are hearing. As we improve our understaning of what we hear, we rely less on music theory. Many highly skilled jazz musicians say to learn theory to improve your playing, then forget it.

Perhaps a different approach, but perhaps listen to some music first and let the theory follow. My first recommenation is always Mile Davis's "Kind of Blue". Davis led a sextet featuring saxophonists John Coltrane and Julian "Cannonball" Adderley, pianist Bill Evans, bassist Paul Chambers, and drummer Jimmy Cobb. Pianist Wynton Kelly appears on one track – "Freddie Freeloader" and plays a memorable solo.

I don't know about the guitarist, but the bassist would find a 5 string handy, so he could learn the song in closed position and just shift up or down as required. In Texas, we have a lot of guitarists that play detuned to Eb ala Jimi Hendrix and SRV, especially for blues, I usually keep a detuned bass for those fellows, but a 5 string works better for jam sessions.

https://en.wikipedia.org/wiki/Phil_Spalding