This thread addresses and explains the most prudent approach based on the latest research and data. If it isnt a sticky yet it should be.
http://forums.steroid.com/showthread...-cycle-Swifto&
btw - kill estrogen - prevent aromatization of test to estrogen ...lets not waste time arguing semantics.
ai's prevent aromatization - aromasin one way / letro and adex another. All to varying degrees.
As explained in the thread I linked too-aromasin has some benefits over the others in most cases for our purposes.
IMO nolva is now relegated to pct and emegency gyno treatment alongside the ai you are running if gyno symptoms occur. The ai dosage can then be upped ( or switched if necessary to letro) and after symptoms subside the nolva on cycle can prob be dropped.