you've ran ONE cycle in your life and you've already determined that your not gyno prone !?
FYI - running an AI has a ton to do with more then just gyno. Taking that much sustanon the Test is going to aromatize, period. that means its going to convert to estrogen and elevate your E levels, and everything that comes with elevated estrogen (water retention, high blood pressure, inflammation, anxiety, etc). Its just not healthy, and running an AI is a common sense thing to do when taking Test (unless your going for a sex change and you want the elevated estrogen)
* note- like T stated,, running a smaller TRT dose of test may not require much or any AI.. especially if your running Mast along with it. But 700-1000 mg is a lot