Pretty much what Smont said. If you're running a prohormone like andros that is on the milder side... say a 1-DHEA and 4-DHEA cycle, then you can probably run the SERM even lower - clomid @ 25/25/12.5/12.5 or nolva @ 20/20/10/10. When I run a very mild cycle I will run the SERM like that and I recover just fine. But what Smont laid out is pretty much the standard of what I use for PCT 90% of the time.