I also use Test P, but at 25mg daily. This dose has had to be increased over the years to maintain the same levels of total testosterone. Not sure if that's due to some sort of desensitization or I'm actually using more due to having more muscle. However, there is no way to know how anyone is going to respond other than to just committing to a dose and frequency and getting labs in about 4-6 weeks and then adjusting from there. It is a painstakingly slow process. It took me years, and then the body will change in some way and make you chase your tail some more.
hCG I use at 250iU three times a week. 500iU really seems to mess with my estrogen and gives no increased benefit (testicular fullness, for example). However, if I use less then 250iU, my testicles will begin to ache after a few days. So somewhere around that dose is right for me. I'm not sure hCG desensitization is a thing anymore. I think what may happen is degradation to the hCG itself causing the appearance of desensitization. I know it's been shown with analyses this doesn't seem to happen, but in practice, I swear it does... somehow. What I do is buy the 10,000iU vials from ReliableRx (Sifasi-HP), reconstitute, and then fill 14 syringes (one ends up a partial). Each syringe is for one week. The rest get frozen, and I pull one out at the beginning of each week. This has worked very well for me, and I know it works, because if it didn't, the testicular pain would let me know.
hMG I have no experience. It's always been too cost prohibitive. Though I do wonder if I ever wanted to try and have a child if it would do anything for me. I had a sperm test done a few years ago, and it was an absolute ghost town... not a single sperm.
Anavar is a lovely compound. I absolutely love it and took it at 20mg morning and night (40mg daily total) for years (I did not cycle it), but it did skew my lipids to a point where I finally had to reset. They weren't awful. Triglycerides were always great, but HDL was too low, and LDL was just a tad above the top end of the reference range. Lipids are great, now, but I lost a lot of "push" in the gym without Anavar. This has got me thinking about going back on it now, but I'm trying to get into the top classification for my life insurance policy (cheapest). I need to just go ahead and schedule the physical and get it done.
I use Exemestane as well for estrogen control, but I do not take it regularly. It does too good of a job, even at low doses (like 5mg), and regular dosing would keep my estrogen crushed. I have to go based on symptoms.. like irritability, food cravings, etc. The problem is hormonal influences are so damn subtle and fundamental it can be very hard to tell sometimes until it gets bad enough to the point you realize it. It usually ends up I take Exemestane at 5mg every few weeks. It's total guesswork based on feels. Primo does an excellent job for me tamping the peaks for estrogen. Otherwise, it becomes a crazy, unpredictable ride... too high or too low.. never under control.