I would not want to find myself in similar situation, you need all seven good but possibly different power cords.
I would probably put one on cd player, another one on preamp and the third one on regenerator.
Or, one on preamp and two on monoblocks
Or, one on regenerator and two on monoblocks.
In my system, and I also use PS Audio regenerator for everything, the biggest difference is with the power cord on integrated amp, which covers both preamp and power amp. Second biggest - on regenerator, third biggest on cd player, and forth on the phono stage.
I would probably put one on cd player, another one on preamp and the third one on regenerator.
Or, one on preamp and two on monoblocks
Or, one on regenerator and two on monoblocks.
In my system, and I also use PS Audio regenerator for everything, the biggest difference is with the power cord on integrated amp, which covers both preamp and power amp. Second biggest - on regenerator, third biggest on cd player, and forth on the phono stage.