All of this is too complicated and sounds like textbook Todd Lee youtube script.
It is difficult to sell old basic recipes, so what youtube content creators do is try to be authentic with original content, regardless if it is better than the old basic proven recipes.
You are talking about not using an AI and then adding masteron, or even worse, DHB. Why not research which AIs you can use and compare with masteron?
Let me give you a short cut to what you will figure out in a few years and tons of money spent:
Arimidex affects lipids just a bit, barely noticeable, and even less if you figure out your minimum effective dose. Exemestane affects them even less - personally I barely got changes in lipids from test only with exemestane cycles. Masteron, however, will crush your lipids, and from my experience and shared experience with real life friends who have used AAS for years, dosages in the ~300-500mg range don't seem to build any muscle, but give nice cosmetic benefits which you have to be lean to notice. It also gives a CNS boost which all AAS do as you go up in total milligrams.
To sum it up, masteron will wreck your lipids while exemestane will barely make a difference. Masteron will also cost exorbitantly more than exemestane. Testosterone is the best bet for mass and strength, while also the safest option for health. So substituting testosterone with masteron because you won't need an AI just makes no sense.
I also feel compelled to tell you that both masteron and DHB are not for beginners, they are for specific purposes at specific times, none which you have mentioned a need for.