Its not even so much about killing your Gains, Letro is harsh on lipid profile, joins, etc... and no a-dex will not get rid of existing gyno, Only thing that can is the letro.
Im still a little confused. Maybe you shouldn't start a cycle right now if your attempting to reverses some gyno, OR is this for prevention only??
If its for prevention the Aromasin or l-dex will work just fine.