At 150mg you may or may not need an AI still. Some people need 6mg of ADex E5D on TRT doses.
Anyway, the estro rebound is caused by having high test levels. A lot of people think it’s stopping the ADex, and it’s usually not. It’s usually because as they stop the ADex they start pinning stupidly high amounts of HCG and Clomid for PCT. Both of which raise your estrogen levels significantly.
I always do a 2 week drop down to a TRT dose of testosterone for the final two weeks of my cycle and dial the AI down accordingly.
There’s no need for Nolva at all when you do this. And if I wanted to keep anti-gyno stuff on hand I’d keep Ralox, not Nolva. Nolva is pretty nasty and has a lot of weird effects. You need it in PCT to recover from 19-Nors, but there is no other situation I’d use Nolva in 2018 with the wide availability of Raloxifene. Ralox is a lot easier on your body, and it’s actually more effective at preventing gyno than Nolva, and also better at shrinking existing gyno.