Like yogi said E effects people differently and also conversion is different in people as well, but there are other side effects of high E2 that are far worse than gyno that you cannot see or feel.
It’s always good to keep estrogen in range, get bloodwork to find out. Get it before to see where your e2 sits at naturally than during cycle and adjust your dose accordingly, then of course getting bloodwork after cycle is good as well.
You want to use the least amount you can, In this case less is better. Low E2 can have the same sides as high E2, so some people may think they have high e2 so they increase there AI or SERM which then leads them to believe there stuff is fake not knowing they actually need to back the dose off, that’s why blood work is important. It’s good to know how much you need for a given amount of gear.
A SERM can be used on cycle, you will have an elevated amount of estrogen but it will prevent the e2 from binding with the receptors, best to taper off slowly to prevent rebound