Any TRT dose shuts down HPTA, causing LH/FSH--->zero
hCG dose has nothing to do with TRT dose
Clinical research was done sampling intra-testicular testosterone [ITT] inside the tests with find needle extraction [ouch!] Subjects were HPTA shutdown with T cyp injections, LH/FSH were close to zero in a couple of days. 250iu hCG SC EOD restored to close to normal levels, so that is all that you need. Less may not support testicular size/function.
A couple of guys here have had high T-->E2 inside the testes with typical hCG dosing, a few will need a lot less.
50mg T cyp/eth self injected twice a week
0.5mg anastrozole at time of injections, tuned to get near E2=22pg/ml
250iu hCG SC EOD
600iu per week is a bit lightweight and stretching the half life a little too far.
75 mg T per week,
Some are going to suggest that your T dose may be a little too low. 50mg T cyp twice a week would provide steadier levels and steadier levels are better for E2 management with anastrozole. However, your blend will be better than straight T cyp injecting once a week.
Not clear if you meant [75mg T and 300iu hCG] twice a week.