Well most orals are ment to kick start an injectable cycle, orals are more harsh on the liver and the gains are not as maintanable with most orals as injectables are but it also depends on which oral you are using. Gains with Orals like Dbol and Anadrol would not be as maintainable mostly because alot of the gains are usually water weight, but on the other hand orals like Anavar and Winny gains can be more maintainable because they are alot dryer compounds. but there really isn't any reason to do one or the other.