Basically what you are trying to do with the peri workout drink is spike insulin during the workout so your body is shuttling the protein/nutrient rich blood into the muscle. MAG-10, while it will do this to some degree, does not spike insulin like the other products do. It will give results, but the other products here provide better results because of the rapidly absorbing carbs.
Then, 60-90 minutes after your workout is over, and your body has had time to clear the aminos and return to “zero” … You hit it with another spike of protein/nutrients when your muscles are most sensitive (Post workout). In theory, because the spike in amino acids is what is anabolic, you could do this multiple times throughout the day, not just one extra time 60 minutes later.
Coffee isnt really periworkout NUTRITION… Its just a tasty stimulant drink.