Aromatase is a highly individual stuff. Use asin as much as needed to keep gyno and excess bloat at bay.
I personnally use 25mg ED (split am/pm) while using 700mg of test E a week. Most people would need way less.
Remember AIs arent very efficient in men since those drugs are designed for female breast cancer patients, you wont "tank" your estro that easily especially while using a good dose of test.