I see primobolan as an anti-estrogenic aid like a SERM, so not really into high e2 and primo balance. I think while it works, it can be counterproductive as we saw in the blood work a few times in the past few months. @AE1079Primo can drop E2, dose dependent and individual dependent based on the response of the metabolite. I like using it so I have some E2 to use to maximise my GH - IGF-1 conversion. Plus the anabolic and pure tissue gain from it and its versatility. Where as if I use a AI, e2 drops way too low, lipids go out of range and pumps decrease.
That’s my 2C, Eddie has different but valid opinions on it