AI is preferred and 1mg/week is affordable.
AI will increase LH/FSH and T in a normal guy, not when using TRT.
SERM can increase LH/FSH in a normal guy or when using TRT.
Too much SERM [or hCG] can create a lot of T-->E2 inside the testes and anastrozole cannot stop that.
If one has high E2 levels from a SERM, an AI can be helpful but only acting on T-->E2 outside the testes.
SERMs are Selective and do not block all E2 actions, so SERM+AI may be needed to prevent some problems.
High dose SERM/hCG is totally wrong and many BB and steroid forums are full of misinformation and 'bro science'.
Do not stack SERM+hCG
So you can see that there are some complexities. Most of the tribal knowledge here is in the stickies.