First of all clear up your acne, if one course of Accutane did not help try another one. Doing treatments while having so much active acne can result in even more acne and infections. Dermarolling/Dermastamp wont help much in my opinion, you need to do lasers such as Fraxel Repair or Deep FX.
Also, maybe abit unorthodox, but look into Dutasteride, I have been taking it for my hair loss and I have noticed that it helped my skin also. Hair loss & acne are caused by DHT, Dutasteride is very effective at blocking DHT.