- Harmonising Lydian scale with 7th chords — 30m
- All keys starting on C around the cycle of 4ths
- ii — V — I’s in major keys in shell voicings through the full cycle of 4th (Dan Haerle, skill 40, both pages at 80bpm) — 30m
- Minor to dominant cycle progressions (two skills recap from Dan Haerle book) — 20m
