Thanks Bill! I've read that exemestane has a positive effect on IGF production while non-steroidal inhibitors decrease IGF. Testosterone is boosted with aromasin. IME exemestane is also easier to adjust than arimidex. Erectile dysfunction is the main side effect of aromatase inhibitors. If someone does B+C with UGL steroids, estrogen levels can be very hard to control. But, maybe I will reassess this idea...
Steroidal AIs seem superior to nonsteroidal inhibitors for male use. But, maybe the differences are not really significant. I actually think formastane and "Arimistane" (androsta-3,5-diene-7,17-dione) could be great for TRT and cycling. The only problem is absorption. An esterified, injectable version of formestane I think would be useful. It could be directly added to testosterone preparations at ~10-25mg/mL
From another thread on T-Nation: