Late to this discussion, but I’ve started 50mg of Proviron ED along with my “cruise” of 40mg Test Prop, 20mg NPP, and 20mg Mast Prop. I recognize that the Proviron may be redundant, but I’m trying all permutations: Just the mast, just the proviron, both, neither. We’ll see how it goes. But generally speaking, Proviron and Mast accomplish largely the same thing, though some literature indicates that Mast has more of an anabolic component than Proviron. What I do know is that 40mg of Test Prop (Flash) keeps me around 1800 total test and about 900 free, so long as I am on Mast Prop. Would love to raise that free test number even further with adding the Proviron. I also know that more than 50mg of Mast Prop ED makes me one shredded, but achy mother.