You can get by with donating blood to keep the HCT below 51 until you crash your ferritin. Donating 1 pint will drop your HCT by 2-3 points. It will also drop your ferritin by ~20%
So if you start donating blood you need to add ferritin to your blood tests. Once you’ve crashed reducing your T dose is all there is. Plus you will need to take a iron supplement with a high dose of vit C. which will fix your ferritin in about 6 months but iron supplement also increase HCT so it just sucks. Ask me how I know and how I have spent my last 8 months running 80mg/wk. Only last month my ferritin came back 109 and my doc OK’d 120mg/wk with HCT and ferritin tests in 3 months.