Bro, if your acne prone deca will break you out and so will primo. Primo is an androgen, so is proviron.. any androgen will break you out. 50mg of prop eod is a waste... minimum 100mg eod, but I recommend ed. If your gonna do it do it right, you definitely need test in there. Read up on deca dick too, you'll see why you NEVER run deca without test unless you really want to piss off your girlfriend and make her feel insecure... If you do use deca there is no need to taper it down, just run 400mg all the way through. I've never used primo so I can't comment on it but from what I know it's not worth the money. BTW make sure your running a higher amount of test than deca.