All good info already, just some blurbs:
You only need the 4-AD and/or EpiA to counter any lethargic sides from the 1-Andro - some people do solo 1-AD cycles with nothing else, so it is variable... but the consensus is that yes, you are more than likely to experience lethargy. Testosterone and DHT are what make you "feel good", so that is where the 4 and Epi come in. If you just take 4-AD, you are counting on it's 2-Step conversion to Testosterone, and then it's 5alpha Reductase into DHT (and some Estrogen). Adding Epi to the 4-AD sort of stacks the deck, and also adds (depending on dose) strength, aggression and "AI" like properties.
It all depends on how much you want to spend on the cycle. I did just 1 & 4 and loved it. I'm in the "No AI during a DHEA derivative cycle" camp - especially if taking Epiandro - there just isn't that much conversion to Estrogen, and *some* Estrogen is GOOD (lipids, etc...). Just have Exemestane (Aromasin) in the cabinet and only break the glass if you *really* have issues with breast tissue. Dosing is all over the place, but considering that within 24hours, Aromasin will whack ~70% of all Estrogen, and ~98% within 48 hours (taking a little liberty with the numbers, but close) You can start at 1/4 pill or 6.25mg/Day (or EOD to be really conservative). Note: I've never needed an AI, so do your due diligence.
But yes, if you *do* experience breast tissue issues, you would dose the Aromasin on cycle. Also not a fan of AI's (again, for DHEA derivatives) during PCT - the Clomid/Nolva is protecting the breast tissue while your body's CYP enzymatic system is clearing the excess, and where SHBG is your friend - each individuals mileage may vary.