Thats too vague a question with too many factors. Test/Gear dose, body fat %, your personal biology all come into play. Best thing if possible is to start with a recommended dose based on your gear dose and get bloodwork and adjust as necessary.
That may work great for Joe Blow on 300mg of test a week but not for Jack brown on 700mg test a week.
There is no one size fits all dose and the sooner everyone realizes that and stops guessing the sooner we will quit seeing these stupid threads about gyno and crashed estrogen levels.
most people will have elevated estrogen on as little as 150mg a week of test so an AI should be used if you dont want to go bra shopping.
Depending on yoru test dose start a reasonable amount of AI when you start your cycle. Then get labs a few weeks in and adjust AI accordingly.