Looks like a good cycle. Looks like one I built. Are you asking where to add HCG? You can take it starting at any point within the cycle. Maybe week 4-5 would be a good place to begin adding 250iu 2x wk through the rest of the cycle and ending 3 days before PCT. As for accutane, I would not use it if you are planning to take oral steroids. I would either leave the winstrol out or leave the accutane out. If you want to leave the winny out, you could replace it with masteron wk 3-12. If you use Geneza Mast200, you can get away with using 1cc 2x wk, injecting with your test. This would be a safer otpion as your liver is going to be taxed by the accutane and winny alone, and taxed worse when taken together. 

As for your goals, remember that fat loss is going to be a result of your diet. The steroids will make you look hard as long as you are dieting hard and get lean. Otherwise, the steroids alone will not get you ripped. You can use clen if you like, which will help you to burn fat directly and if you have your diet nailed, the clen will speed the process up. 20 lbs is a lot of fat bro but you can do it if you are willing to push. If you don't know how to push to get the results you want, I am available for hire. I walk people, week by week, through diet programs designed for their needs and goals. Anyone interested can contact me at Next Level Nutrition, here at Naps Gear! 

Work hard brother and get the job done.