I buddy of mine used letro between cycles(I do that now as well) and hes natrual testosterone levels was 4x higher than normal. (Once your estro drops the hypotalamus/pituitary starts producing much more LH,) b/c testosterone-estrogen ratio is supossed to have a certain natrual ratio. By using an AI, youre basically fooling your body to produce more tesosterone, which defently means more muscle and strenght.

Libido can take a hit if estro gets to low though. I would recomend you try taking arimidex at 1 mg ed+clomid 50 mgs ed. Your test levels should increase signifently, and libido should go up as well.