@Sugar
Hairdut provided studies showing that transdermal DHEA, P4, and K2 applied to testicles (dissolved in DMSO/ethanol) is very effective at raising androgens. There’s even an individual on the RP forum who got his test into the 1000+ ng/dL range using that combo.
You could also look into the combination of oral DHEA and androsterone which again Haidut provides evidence for completely revitalizing castrated rats.
If you want to do an experiment with straight T/DHT, that will most likely work too and be very effective. I myself am going to do an experiment with t dissolved in tocopherols and taken orally. I think 5-10 mg/day dissolved in the vitamin E should have a very powerful effect, together with p4 since supplemental androgens can down regulate the enzymes that produce/convert other hormones into the precursor steroids.
If you don’t want to dissolve in tocopherols, I found a study showing that 200 mg T given as free crystals 2x/day was able to raise the T levels of Eunuchs to full normal levels for the entire day, and that was in the 70’s.