No no, don't go by rule of thumb with AI (or even with the Endo's recommendation of 1 mg Adex ED - that will absolutely crash your e2, and give you a really bad time. Even as a man you need e2 ;) a good range would be 15-30 pg/ml ).
Get blood tested, and adjust your AI intake according to the test - this really the best way, trust an experienced user of Roids. Since you are not shooting high amounts of aromatizing Compounds in your Body, just a legitimate Dose of TRT Test - you probably could get away without using any AI at all. But again - only Bloods will tell you the real story. I can't stress it enough, get regular blood work done - for your own sake, it is really worth it.
I would like to give a book recommendation, look up Nelson Vergel's "Testosterone: A Man's Guide- Second Edition"
> e.g. https://www.amazon.com/Testosterone-Guide-Second-Nelson-Vergel/dp/0966223128
He is explains everything you need to know for TRT, from a Patients perspective - I cherish that book, it taught me a lot. He also has a nice Forum at excelmale.com, they are more concerned with legit TRT - unlike us Meatheads here in r/steroids, hehe ;).
Hope I was a little bit of help - have a good one Mate.
If you want TRT Advice, I would consider joining the excellent Forum https://www.excelmale.com/forum.php , and pay also /r/Testosterone a vist.
Nelson Vergels Book on TrT is also a very good introduction into the Subject: https://www.amazon.com/Testosterone-Guide-Second-Nelson-Vergel/dp/0966223128
This is about treating the Symptons of chronic low Test, and all the baggage it brings with it. Not about getting jacked (or looking for Legal Steroids). For getting jacked, I would never go the TRT Route, and self prescribe - and just be smart about it. Use pharma Test, get bloodwork done, keep the levels in a healthy range, all that Jazz. Blast and cruise into the sun.