If you decide to use letro to try an reduce that gyno then you will have to just not worry about estrogen. The amount you will need to use to reverse it if its full blown will most certainly crush your estrogen into non existence. if it was me i would take my chances. Mightymouse has done it and it worked well for him.
I would taper off slowly though or you will most def get a rebound since it is not a suicidal AI.
i would go from 2.5mg ed to 1.25mg Ed to 1.25mg EOD then 1.25mg E3D then finally .625mg E3D and see if that works. if not go back up in the same increments to find your sweet spot. each taper dose should be ran for AT LEAST 3 days.
In all honesty i would try switching to exemestane once the letro has done its job @ 12.5-25mg ED. Aromasin is the best Aromatase inhibitor (AI) because its suicidal (meaning no rebound) and because it can effectively be dosed ED. Aromasin is by far the best in treating acne IMO.
Not to mention that it will not effect your lipids like the other 2 AI's.