I am on my first cycle as well man, literally same amount of testosterone. I started taking arimidex because of certain estrogen side effects, and let me tell you, 4 doses into a minimal dose my E2 dropped too low and you do not want that. These are nasty drugs and should be taken only when absolutely necessary, a big lesson I learned in my first cycle. Here’s the thing about E2. First of all, estrogen is not bad. It is vital for sexual function, anabolism, joint/bone health, serotonin, etc. Second of all, of course your E2 is going to rise when your testosterone hits supraphysiological levels. This is your body maintaining homeostasis. Eat well, workout right, get your vitamins, and the hormones will take care of themselves. I have completely dropped my AI because of how awful low E2 is. As @studhammer stated, your body needs to adjust to the hormones. Focus on staying healthy, active, and with a good diet and you will be much better off with no AI unless it is absolutely necessary. Even if gyno does start to flare up, stick to just 10-20mg of nolva ED, no AI.