One variable that
Administration procedure is one variable you can get a ton of mileage out of without adding any extra drugs into the mix. It's actually two variables: injection frequency and injecting intramuscularly versus subcutaneous.
In short, many of the side effects of testosterone occur when you introduce a big chunk of it to the body at one time. Blood levels spike, and the body responds. This gives you more of both the desirable and undesirable effects of testosterone.
If you are a powerlifter this might be great; you inject your weekly dose so that your serum testosterone peaks on your grueling leg day, and your T level tapers off from there. However, at that peak concentration, it's also when you tend to aromatize the most, when your cholesterol production will accelerate, and when your blood pressure will be its highest. If you can't leverage that peak for a training effect, you don't want it. So what can you do?
If you split your dose up into several injections per week -- every other day or Monday, Wednesday, and Friday, for instance -- you never get that very high peak. You will aromatize less, never max out your cholesterol production in the liver, and reduce the strain on the heart and other organs by modulating the BP spike. All good things, none requiring extra drugs.
If you want to make the release even more gradual, you can inject subcutaneously as well, since esters in subq tissue enter the blood more slowly. The result is as close to a stable T level as you can get if you're injecting an oil-based preparation of a common ester.
Just so it doesn't sound like MWF subq is magic, you can push enough of the longest ester you want and still end up aromatizing, with a shitty lipid panel, and wrecked kidneys from unmanaged BP. But, for TRT-level doses, it should obviate the need to enlist ancillary drugs almost entirely, and can keep some people from needing extra compounds up to 350-500 mg/wk.