Of course Sustanon or Omnadren can be pretty good for keepable gains, as they both last a long time in the system (up to 3 or even 4 weeks). I have had good success with Sustanon, which is 30mg Propionate, 60mg Phenylpropionate, 60mg Isocaproate, 100mg Decanoate for each 250mg shot (as all you pros already know).