These are very different compounds that serve different purposes. Nolv is good for gyno flare ups and PCT. Proviron is not my favorite compound but has some advantages of its own. As far as an AI A-dex or Aromasin are my favorites, I wouldn't reccommend proviron for estrogen control.
Do yourself a favor and read up a little before you make any decisions as to what to put into your body. IF done correctly AAS can be used with minimal health risks.