14.47Combine diminished and secondary dominants

Try:

Cmaj7 → E7 → Am7 → A7 → Dm7 → F♯°7 → G7 → Cmaj7

Now you're combining:

• secondary dominants
• diminished passing chord
• ii–V–I
• seventh chords

We're starting to assemble the harmonic vocabulary rather than studying isolated topics.