The only other thing I would add is possibly creatine or maybe a natty test booster but the stack is pretty serious on its own. I am doing a modified version here shortly that will be Prime, AP, and Diesel Test Hardcore in place of PowerFULL. As far as the Jack3d goes, you have a great additional pre-workout kick with that added to the mix. I guess the only other item I would consider is adding in VAT Attack by USPowders if you are looking to get rid of some stubborn fat and add to the recomp effects of the A stack.