I'm stacking sus and cyp right now actually. I hit 125mg sus eod, and 125mg cyp twice/wk, so its around 700 -750mg wk total. So far so good, I dont have any acne at all this time, I find the cyp helps balance out the timing of the sustanon. It's like you have that long chain in there so its not as much of this up and down shit, especially with eod injections of the sus.