well i may not be billy but heres how i see it from a technical aspect.
When you are training naturally you grow with a balance of testosterone and estrogen, so while on cycle you are elevating the testosterone while leaving the estrogen at the same level it was, this throws the body out of homeostasis hormonally and thus to correct this your body will produce more estrogen. Now, by doing so you may begin to see the side effects of elevated estrogen levels *this may not occur in which case you are less sensitive to estrogen, a good thing* However Estrogen is nessacary for growth as it helps us to retain water and other delightful properties.
Anti-e's inhibit the bodies ability to produce excessive estrogen thru the two means most people know, Aromatase Inhabitation and Estrogen Receptor Binding/antagonism. The reason we do this is so the body does not produce MORE estrogen then testosterone and by letting testosterone in the majority to do what it needs which leads to more protein synthesis,etc and thus more growth.
It is my opinion that if you were to completely block out estrogen as a whole instead of neutralize excessive estrogen you would be inhibiting growth because without the combination of the two hormones growth is limited.
The way in which you use Anti-e's is entirely up to how your body responds to excessive estrogen, if you have had signs of gyno before and needed nolvadex to calm it down then it might be a good idea to run Arimidex or Femara or Aromasin. .5mg ed seems to be popular for Armidex, 2.5mg ed of Femara and 25mg of Aromasin every 3-5 days. If you have never had problems with estrogen in the past then these may not be required at all in which case having Nolvadex on hand is all that would be nessacary..
Cliff notes: Test is great but estrogen is nessacary in some amount.