I agree that they are powerful drugs and should be treated as such.
However, I wonder whether or not you truly "did everything right". Anyone on such a program should, IMO, be taking a comprehensive protective stack, including (with respect to the heart muscle itself) multi-gram doses of taurine, abundant CoQ10 (perhaps 200 mgs/day or more), and especially potassium. Recall that the adult potassium requirement is about 4.5 grams/day, and that few people, except for some vegetarians, ever reach that. In other words, almost everyone is in a chronic low-grade potassium deficit. (Even me, with all my knowledge about potassium's import, seldom reach 4.5 grams in a day, unless I take a supplement.) But even the 4.5 grams/day might not be enough for someone with the added stress of a AAS/HGH/etc. regime. No one knows what the optimal K intake would be under such a circumstance, but my bet is that it would exceed the 4.5 grams to at least some extent. In practice, impossible without daily supplementation. And btw, taurine and potassium work together: taurine helps cells retain potassium. Magnesium is helpful for this as well. The RDI for Mg is too low at 300 mgs/day. For someone under stress as we are discussing, 600 mgs/day would I imagine be a good minimum.
But that's just stuff pertaining to the heart muscle itself. There's also the equally-important matter of blood supply; presence or absence of ischemia, or arterial blockage. This is a common cause of congestive heart and cardiomyopathy. And this goes to the whole complex (and controversial!) matter of cholesterol, lipoproteins and such. I won't try to outline procedures and stacks to avert atherosclerosis and coronary artery disease; that's the subject of a long treatise. Just note that if you are persistently (more than a few months per year) using AAS that crash HDL or induce other lipid problems, you'll have to go to great lengths to avoid vascular disease. If the use is continual, it might even not be possible to avert disease; I don't know.
How many BBers using HDL-crashing AAS drugs are on even a basic, cheap, old-fashioned stack for lipid modification: high-dose niacin with chromium, magnesium, tocopherols, lecithin and soluble fiber? Let alone more fancy stuff (statins, fibrates, toremiphene/raloxifene, etc.)? Rich Piana, Dallas McCarver, Mike Matarazzo, and dozens of others might still be alive today if they had put half as much attention on health protection as they put on their latest/greatest super-mega-AAS/etc. cycle. Or so I think, crazy sob that I am.
I don't doubt, BigJJ, that you "legit did everything you were supposed to do". I just wonder how well-informed were the people you were listening to, and whether or not they had an adequately-comprehensive grasp of the these problems and the nature of the program that might prevent them. Eating a "good diet" and getting enough sleep is only the beginning, far from adequate. IMO.
My view is: if you want bigtime results with bigtime AAS/etc. dosing, while keeping risk of catastrophic cardiovascular, renal and other outcomes in check, then accompany with bigtime protective stacks, which should occupy AT LEAST as much mental space (intellectual effort), and expense, and material tedium (doing the protective supplements and etc. every day), as your steroid stuff.
Regarding renal protection, see here:
The bodybuilding lifestyle using anabolic steroids, growth hormone and high protein diet, over years, can apparently cause a variety of dreadful kidney diseases. By "complementary" in the title I assume the authors mean "using a combination of agents", in this case the typical stack just...
www.bluelight.org
PS: one more thing: my enthusiasm for potassium must be taken with a grain of... er... KCl? In people WITH existing congestive heart failure, hyperkalemia is a risk, so supplementation must be cautious. Potassium is a remedy, and people with congestive hearts do need it, but it can be overdone. Physician guidance needed! And also taurine needed, to optimize cellular transport and retention of K that is available.