You are not going to keep more of your gains with var, or any other steriod for that matter. Over time, your body will return to homeostasis no matter what drug you take and you will go back to your old body weight. There is no magic pill that will permanently increase your test levels, and that is really the only way you could keep gains permanently. The only reason stronger drugs like test, deca, dbol, etc, have a reputation for losing gains compared to anavar is that in addition to muscle they cause water retention, which sheds shortly after your cycle. The "gains" lost are mostly water at that point.