That's one of the reasons I dont use DECA. For one I dont like the gains(doesnt work well for me) and no matter how much adex i eat my nipples are still sore and on the verge of developing gyno. DECA has that effect on some people. I did not try aromasin so cant say it will be better than adex but even at 1mg adex EOD wasnt doing nothing at all for me(adex was pharm grade from us pharmacy). I have been on 700mg tren A a week and .25mg of the same adex e3d did the job perfectly but not with deca, not for me.. I would never touch letro unless i absolutely had to. If aromasin doesnt work I would just drop the deca. Best of luck bro!