Once you go with losing no more than 1ppm of chlorine overnight and have no CC, I think I would maintain the high cl level for one additional day for insurance. Then, if all is still good, let it drift down.

It won't hurt to do a maintenance dose of polyquat once you are past this, but remember it will make your cl plummet. That is ok, but just be aware and be ready to add some bleach.

Once you are in maintenance mode, you need to test at least once a day. You shock when you have any CC above 0.5 and maybe after a heavy rain that may put a lot of organic debris in your pool or after an exceptionally heavy swimmer load.