@Jacob Williams you seem to have a good understanding about antiandrogen medications for the most part and seem to know the risks. I just encourage you to actually get your blood levels checked for hormone levels. This isn't the type of thing that you can go by how you feel. Also, I think you should maybe give treatment more time before changing. Frequently changing treatments can cause sheds.
As for antigonadotropins (as opposed to blockers), you could try progesterone, though I believe that it can't be taken orally because it can't go through liver. A lot of trans woman use a rectal suppository of progesterone, though I think injections would work too if you don't want to stick stuff up your bum. Theoretically, once you are an a large dose of E2, the estrogen will suppress your T levels and cause your testes to shutdown
Theoretically once your T levels reach near-zero, you wouldn't need any blockers or 5-alpha reductase inhibitors, but even after testicular shutdown there will be some small amount of T produced in the adrenal glands. This usually isn't a problem, but if you have some type of crazy overexpression of ARs, who knows. Just be aware that having zero testosterone at all is usually not good, even women need small amounts for normal physiological functioning