I understand what you are saying Cell and just like you were saying AP is not "needed" with EPI.....but the way in which EPI & AP interact with macro-nutrients is much different.
Epistane increases nitrogen retention and acts as an AI (aromitase inhibitor) in the body. The end result in most users will be a recomposition effect (lean gains and fat-loss). The lean muscle gains come from the increase in nitrogen retention and the fat-loss comes from the AI effects of the compound.
Anabolic Pump will also provide the same recomposition effect in most users but via a completely different pathway. AP's main ingredient allows users to eat substantially more carbs without the unwanted fat gain that would usually accompany such a large intake of CHO (carbohydrates). AP allows your muscles to store more glucose. For example without AP, let's say when you eat 100 CHO, your body stores: 50% in your muscle cells, 20% in your adipose tissue, 20% in your liver, and uses the remaining 10% for it's immediate energy needs. (these numbers were MADE UP, this is NOT EXACT SCIENCE! I am just making a point

) Now with AP, your body stores: 65% in your muscle cells, 5% in your adipose tissue, 20% in your liver, and uses the remaining 10% for it's immediate energy needs. Over time, your fat cells will shrink and you will gain more lean weight because of WHERE the CHO are stored not necessarily because of how many CHO you ingested. Now, the end result will be a steady "recomp" effect via CHO repartitioning.
Both EPI and AP will give you a nice "recomp" effect but they do it in different ways. One uses nitrogen/estrogen manipulation and the other uses CHO manipulation. In my opinion, you would stack the two for an AMAZING "recomp" effect
