You can help control aromatization by increasing the frequency of your TRT shots. An example could be if you dose your test at 150mg once weekly then 3 doses of 50mg would be even better. Now if you can dose 20mg test ed using slin pins that could even eliminate the need for any AI when on TRT. Although for some AI's are a must and I would always recommend Exemestane (Aromasin) then Anastrozole (Arimidex). Exemestane is slightly more lipid friendly so thats why it is first. You want your estrogen in range for optimal libido, well being, strength etc. Most people use far too much AI and that can cause even more issues. I would recommend 5mg exemestane ed to start and see how that treats you. Get a blood test after 1 month or so and make changes if needed.