I looked into the intratesticular T concentrations a bit and that’s what I came up with:
LH and FSH were profoundly suppressed to 5% and 3% of baseline, respectively, and ITT was suppressed by 94% (1234 to 72 nmol/liter) in the T enanthate/placebo group. ITT increased linearly with increasing hCG dose (P < 0.001). Posttreatment ITT was 25% less than baseline in the 125 IU hCG group, 7% less than baseline in the 250 IU hCG group [all every other day], and 26% greater than baseline in the 500 IU hCG group.
Which leads me to believe, if you inject 500 IU two times weekly your intratesticar T levels are most likely within normal range (if you’re shut down and you inject more, you should also not get crazy high levels otherwise why inject that much when you respond well?) which means even a competitive AI will do it’s job.
For more info on competitive AIs see my Independence Day post here:
Now, even if a competitive AI like anastrozol doesn’t work, you’d always have the option of Exemestane to inhibit Aromatase which has different kinetics (see post) and simply doesn’t care about T level that much.