hCG is used to get the testes recovered, size and firmness, the transfer to SERM to provide LH/FSH to replace hCG. You do not want a gap between hCG and SERM. One could use a SERM alone without hCG, but I think that is is better to limits ones duration on SERMs. SERMs also ‘exercise’ the pituitary response to commands from the hypothalamus.
Note that high levels of hCG or LH can reduce LH receptor response. Open loop LH production from SERM use can cause problems, just like high dose hCG. This is another reason to limit SERM duration. It has been shown that lower doses of SERMs are just as effective, suggesting that standard SERM doses may be too high.
AI should be adjusted to FT/bio-T levels. This is guesswork without labs. If the testes are responding well to hCG or SERM, especially with young men, anastrozole 1mg/wk in EOD divided dosing would be appropriate and this should be reduced to 0.5mg/week as one tapers off of the SERM.
Never stop SERMs suddenly, SERMs increase E2 levels. Stopping suddenly exposes the HPTA to the elevated E2 levels and that is HPTA repressive.
When you are done, you will feel, or not feel success. You may not need labs to know if things are working.