I'm an over-responder to AI's, so after I took 3 .125 anastrozole, estrogen was 12 pg/mL which isn't so terrible considering I'm a low SHBG guy as I have a ton of free estrogen floating around even at the lower numbers.
I'm planning of dosing 0.050 anastrozole and dissolving it in 5mls of vodka using graduated droppers and dosing .4mls twice weekly when E2 gets out of hand again. When testosterone is low and estrogen close to the top of the ranges, you can bet on estrogen being a problem once testosterone is sufficiently elevated.
Losing significant weight can reduce or eliminate the need for AI's.