Time for a practical application:
If we agree that Min Radius = Max Rate then you have just recovered from a flat spin and are now pointing strait at the ground at 80kts and 500ft AGL, do you:
1. Keep power at idle, pull to the buffet and then limit load at Va
2. Apply full power, pull to buffet then power off at Va and hold limit load
3. Only apply full power if you know that you will not reach Va in a 90° pull out from 80kts and so will hit the tightest radius fastest without being load limited in at any point.
4. Do not apply any power because although the radius may be wider on the buffet initially the rate is slower which means you spend more time in the pull out without gravity negatively impacting lift required.