It has been a while since I've been in the seat of a C210, but I imagine it would be something like this:
Descent: Bring MAP back from cruise power at a rate of 1" per minute to join the circuit at 18".
Circuit Join: 18" and cruise RPM setting.
Downwind (abeam landing runway threshold): 15" - Gear Down - Flaps 10.
Base: Same as DW but select flaps 20 about halfway through.
Final: Select flaps 30 and trend towards Vref over the fence.
Gear and Flaps speeds for each model are below.
