Speaking from personal appearance, I know several IFBB pros (living in South Florida contributes to that.)
We often kick around various topics at times, somtimes related to AAS sometimes not.. I have a very good idea at what nearly all of them run.
Two pros in particular (I have posted this before in the past) I know EXACTLY what they use. The reason I know is because they order the same shit as me from the same person. (and a couple of more "same" aspects to this that remain unsaid for security).
One pro is 320 in the offseason with abs. That ain't fat either. 6'2" and 320 of rock hard muscle. His training is a joke. His motto is "if I sweat, it's because this is Ft Lauderdale and it's hot outside." And he means this. He is rather laid back in his training methods. He uses 600mg test cyp and 600mg deca per week. Year round. Never diviates. Tried winstrol and it hurt his joints so he never tried it again.
The other pro is half my size at the most 205-215lbs. He turned pro from a middle weight win at the Nationals. He trains hard as hell. Dude is all heart in the gym. Uses over 4 grams a week. Various things. Takes a three CC shot per day.
So in short, it makes no difference what any so called "expert" or "guru" or author or sideshow internet puppet master says about roids. You are going to learn more from your own use than anything ever written. It is all unique. It's not a magic potion that works the same in everyone. Another pro that actually did not start winning shows did so only after he dropped all androgenic compounds from his prep. No more test, anadrol, dbol, etc.. He uses nothing but EQ, winstrol, primo and anavar (140mg daily BTG) and he actually grows. Other people can not grow at all unless they use androgens in the mix.
You basically have to try various things and see what works for you, but when you do this, you must keep your training and diet the same in order to effectively gauge the AAS benefits so you will know the variations in differences is not related to dietary or training changes.