I have to use 1mg of armidex a day when going over 600mg of test. I don't necessarily get gyno if I don't go that high, but the extra estrogen really really screws with my mood, makes me bloated and throws on fat like no tomorrow. This is funny because I have decent genetics for leaness and normally can eat anything, even when clean and not get over 12%. One guy I train with is on 700mg of test suspension a week with no anti-estros, doesn't hold any water and is actually leaning out. I guess my body just produces alot more aromatase enzyme.
the high tren doses were on short cycles. actually the first time i used steroids it was a short cycle of high dose tren + anadrol and winny per the advice of Bill Roberts. since then i have run it in much lower doses and still gotten great gains. I am currently on half a cc of tren a day and 20mg of winstrol pre-workout, and am growing off that. I really don't think that your cycle philosophy has to be either "only high doses" or "only low doses." at least in my experience, running high doses at times does not ruin your bodies ability to grow off low doses...if anything it upregulates receptors, allowing you to grow better off the low doses. btw i did not come up with this theory, it is what a friend of mine who designs contest prep cycles for alot of people preaches. all the high dose bursts i have used were with fast acting compounds though.
during these high dose periods i do alot of negatives and drop sets, hoping that the combo of gear overload and eccentric tearing will increase satelite cell formation. I then stay on at a much lower dose, back off on the stress techniques and continue to get gains.