Not to be an ass, but a simple google search will answer all your questions.
Okay, I did, this is what I found:
All the experts seem to think that there is no progesteronic activity with Tren and that Tren one of the safest most effective steroids out there. Many board members disagree.
It is the same with using test as a base in every cycle. Experts (those who write books and articles) say you don't need it, most board members disagree.
When people vehimently disagree with the experts, I pause because there aren't endless studies on performance enhancing drugs. I wonder how anyone can be absolutly sure about any of it.
But I'm giving a thumbs down to the Proviron with Tren.