I've found that daily low dosage test and HGH provides excellent long term, gradual improvement in the total health system of my older body. Periodic anti-e, such as 0.25 amiridex MWF is also included. This approach is all meant to improve the numbers on a blood testing to the most favorable point in the range.
If I add another aas, such as an oral, I get a faster muscle building response, but the system starts to misfire ... especially cholesterol. If I do this, I define the program as now a cycle with appropriate measures to be taken, especially more anti-e and a time limit.
PCT is another issue I don't have a handle on yet. I'm working on it and will need some real life experience. Do I even need it seeing my "cycle" ends and HRT is still there. My dosages are not that high under any circumstances.