This is a great topic! I suspect many elite bodybuildes are on HRT for obvious reasons. I would like to contribute my experience with this.
I am a doctor, and I have developed a system of HRT that works best for me. I have had about 20 bloodtests to get the dosage right. I am in my early 30s and weigh 242lbs with 5-6%BF at about 6,1. I have been using 100mg of test enanthate every 5 days. I take 0.5mg arimidex on the day I inject, and 0.5mg on the 3rd day. I also take 1.25mg of finasteride ED in addition to ZMA and saw palmetto. I take whey protein (isopure), N-acetly cysteine (NAC), and large amout of green tea extract. This combination of hormones, drugs and supplements was derived from the results of many bloodtests measuring basically everything including liver enzymes, total and free test, estradiol, DHT. I maintain a free test level that is at the "peak" of normal. I have also noticed that eating fish (about 2lbs salmon/day) and doing consistent cardio has given me an excellent lipid profile. Using HRT is a quality of life issue for me, and has allowed me to maintain an extra 10-15 lbs of muscle with extreme vascularity and muscularity. My libido is always very high, and drops if I use a higher dosage of test. I would like to hear how other people have "customized" their HRT.