Leydig cell desensitization is not an issue at normal doses. Setting aside aromatization, my guess is you should be looking for the dose that maximizes testosterone production. This undoubtedly varies among individuals, but according to one hCG modeling paper, with EOD dosing the peak is likely to occur in the range of 250 to 1,000 IU. Ideally you would start on the lower side, like 300-400 IU EOD, and work up slowly, measuring testosterone to ensure production doesn't decrease. Things may be a little confusing in the beginning because you will have an additive effect with LH until it's suppressed.
1) Do you think it is better dosage EOD or ED? for example would be better 400IU EOD or 200IU ED?
2) After how many days would I see my testicles increase their size? How many weeks should I take HCG? 8-12 weeks?
3) Post HCG I have to use Nolvadex (I read about 10mg ED or EOD) to recover my own LH and FSH right?
Thank you sir