~40 yo Guys who actually are on tst. Share your protocols pls

How often, which tst form and what dose per injection are you? Anything you take additionally to tst? Is mono tst therapy till "end of life" good? How about muscle building? Standard trt will help me with it or I need to take huge doses (I Train 3-5 times a week with almost no effect but total exhaustion) Tia