H-drol is so mild 40mg of tamox might be too much, I'd go with 20/20/10/10 for pct. Milk Thistle I would dose at 2,000mg a day to be on the safe side and yes you should run the milk thistle through pct because tamox is as bad, if not harder on the liver then h-drol. and its always good to take a multi-v and fishoil during cycle. make sure to take the last dose of H-drol before 6pm because it can mess with your sleeping cycle. You might want to look into other support supps like taurine for muscle pumps and various other ones for prostate health, blood pressure, and cholesterol control.
Theres my advice but ultimately you should be fully knowledgeable of Prohormones/ designer steroids before attempting your first cycle and make sure you have maxed out your natural potential with proper diet and exercise because a cycle is only as effective as your diet and workouts