Running an AI like aromasin has many other benefits other than just preventing sides. It keeps the water weight down which can keep the BP down. Aromasin will increase free test making the test work more efficiently. Aromasin increases IGF1, androgens (hardens you up), and will prevent estrogenic sides some visable and some not. It is your choice but you would benefit from AI in my opinion at least once or twice a week is better than nothing.