Over 1200 ng/dl damn, you're lucky. My E2 ref range is 0-146pmol/L and I sit around 120pmol/L on 100mg/wk. What is your test dose? Your E2 is definitely high.
Edit* never mind I read you're on 120mg/wk. I hit about 1100 on 100mg/wk with injections 2x a week. Maybe do more frequent injections to lower estrogen rebound. 20-30pg/mL is ideal. Some like a bit higher. I wouldn't start an AI unless absolutely necessary. Hard on your lipids. Maybe reduce test dose. I'm not sure if you'll notice a difference between 1000ng/dL and 1200ng/dL.