9.21ii–V–I with guide tones

Use C major.

Dm7:

F C

G7:

F B

Cmaj7:

E B

Notice:

Dm7 → G7:

C → B

F stays

G7 → Cmaj7:

F → E

B stays

This is nearly ideal.

Play those two-note shapes repeatedly.

You are training the skeleton of jazz harmony.