I set mine up so it has 8 figures on the lead screen, 8 summaries on the second, andfive numbers (Power being the largest) and cadence and lap time on the third. For training I ride to power on the big number.
If you don’t have power, use HOUR on the third screen. Cadence off road isn’t worth much. Cadence on road and turbo I find vital. I’d buy a second cadence sensor – the bontrager one is very good and doesn’t have speed. The pedal magnet is FAR better than the Garmin one.
If you want cheap approximate power, buy a PowerCal Heart Rate monitor. I ride to that on the turbo, and it’s not bad. I’ve also used my power meter and for simple interval stuff like Sufferfest, the difference is not worth the seven fold price increase.