There are different ways to achieve a flawless skin after acne and it needs medical interventions and commitment on part of the patient. Some of the ways you have already mentioned and there are few more. The treatment has to be customized and that needs a physical appointment. Remember combining treatment modalities help to achieve desired results earlier. Your dermatologist will decide a treatment plan for you after a consultation. Apart from active pharmaceutical medicines, a healthy diet and lifestyle is mandatory to achieve results.