And a whole lot of them get problems afterwards. A doctor of mine told me that he has tons of patients who are former steroid users. Many of them have problems that are not responsive to treatment.
There's a reason that pharmaceuticals go through phase 1, 2, and 3 clinical trials, it's because safety is hard to predict from first principles. Even then, they often miss things. For example HRT was thought to be completely safe for women, well it was in the short term, which is all that bro-scientists would ever notice.
If I took steroids, I'd keep it simple: Testosterone, clomid, hcg, and an aromatase inhibitor, at modest doses, with the total cycle being short.