PCT for 6 Weeks of Prop

I’m starting a short 6 week cycle of Prop at 150mgs eod in a week or two.
In the past I have done 4 weeks of PCT for 2 different 8 week cycles of Test Enanthate with doses of 500mgs a week and 750mgs a week and recovered well with nolvadex at 40,40,20,20.

I was thinking that 3 weeks would be sufficient but I’m not sure what dosing protocol to follow.

Anyone have any advice?