To get all out mass, we need to attack our system from all angles. We need steroids that are highly androgenic and highly anabolic. We need steroids that are known to pack on a lot of mass. In general, steroids that do not aromatize, do not activate the ER and do not pack on a lot of mass aren?t needed. For injectables we would rather have long acting esters than short ones, as the long acting esters tend to pool up in your blood and generally leave you with more hormone at any given point. For orals we prefer those that either aromatize heavily, or cause an explosion of mass by similar estrogenic properties. The use of orals is mainly to kick off the mass cycle, gives you near instant results and puts your body in a good anabolic state when the long acting esters kick in.