Some individuals have different metabolism or enzyme activities and thus the conversion to testosterone may vary. Only a process or trial and error can tell which is the best prohormone for you. Be patient, exercise, eat a decent high protein diet and give yourself at least 4-8 weeks to see the results. If the drug works for you, gradually increase the dose in the next cycle. While stacking is hyped, this is a myth. The body can only build so much muscle at anyone point in time. People encourage stacking primarily because the first drug is ineffective. If the drug works, stick to it. Stacking also increases the chance of side effects .