50mg of proviron worked like a charm for me. You really only want to do enough of a drug to get the desired effect. So I would recommend starting off at 50mg a day (break it up to 2 doses at different times). And if you're having "problems" down there, increase the dosage.
As far as prolactin goes, People overdo the fear of it in regards to using 19-nors. Unless you have bloodwork confirming that your prolactin is high, you shouldn't mess with caber. The rule of thumb with ancillaries is to take just enough to get the job done IF and only IF you need them (because you're experiencing sides). Those drugs also have their own sides and some of them are not very cool. In addition to their own side effects, they also have potential drug interactions. That's not really an issue for somebody who is ONLY taking steroids, but there are a lot of guys who also take antipsychotics or SSRIs and they do need to check that out.
I'm willing to wager nearly every time somebody thinks they're having a 19-nor prolactin issue, it's really the fact that they have low DHT levels. So taking a DHT derivative will help with that a lot. But that's a speculation of mine. If somebody gets bloodwork during the cycle, they can see if it's estrogen or prolactin levels and eliminate a lot of the guessing.
Remember most people are not getting bloodwork before or after a cycle and they certainly are not getting bloodwork during a cycle. I believe the bloodwork should be planned out and money set aside to buy them while you're planning the cycle. If you can't afford the bloodwork, you probably shouldn't be running the cycle. And for most people access to labs is pretty easy these days. You can find site selling various blood tests at popular lab chains. And yeah, they can be expensive, but the endocrinologists you'll be paying to see afterwards (when your dick doesn't work after your cycle) is more expensive.