once you mind capped it at lvl 80.. you don't even need to touch them. just let them grow resources and harvest once in a while no doubt.
This.
Have most of your planets mind-control around 65-70 society. Add a suffix like "MC" to them when they are mind-controlled. Check your "province" page every few days and start MC on those planets. Put a few planets to build special things, give distinctive names, and build such vast hordes of merchantmen and BFs that your resources are moved naturally to their most profitable places.
Which still would leave you with tons of resources idling on random planets. But you could manage it without too much stress.
