Everybody reacts differently to everything I'm afraid.
There is no 'one size fits all' in this game.
You need to find your dosages with AI's and bloodwork certainly helps.
My first couple of cycles where 750mg Test E with no AI. Not a single Estrogen related side issue on both cycles. I have mates who would need to run 50mg of Aromasin a week on that much Test. Go figure.
I now run permanent TRT as an older fellow although certain Endo's I know regard it as a permanent cycle.
I run a quarter 25mg Artomasin tab once a week (as it is a type II suicidal) and sometime go a week without it. 'Feel' is very important and you have to develop it and bloods can back up what you're feeling if you listen to your body.
I prefer Aromasin to Arimidex as discussed.
Timoid
51 YO
6'1"
105 kg
15% BF
On TRT