First of all, what are your stats? age, trainging exp., height, weight, etc. Second, what are your goals? Needto or some of the more experienced vets could help you choose what products suit your needs the best(if your over 21).
I didnt buy a stack, but I could make several. I have 3 bottles of beast, 2 bottles of diesle and epi, and 1 bottle of helladrol.