^^

You can always switch to ,Chest/bis and Shoulders/tris again you need to find what works for you. For me, I have always had strong shoulders so I never had a problem with how I trained them; they always responded well. (Keep in mind the goal is not to lift the heaviest weight but to lift the heaviest you CAN lift in the condition you are for 6-8 repetitions)

This is what I do to get the most of this workout. You have to realize that you are pretty much hitting the same muscle group on every 9th day. You are as good as new now. Go as heavy as you can with proper form and always try to increase the weight last used by 5lbs or push a couple of more reps on the last few set of each exercise. Don't rest more than 60 seconds. If you cant increase the weight or reps try to decrease the rest time. Yes keep a log of everything you do in the gym. It will help you greatly.
If you start hitting a plateau after 6-8 weeks change your routine to a 4 day split for 4-6 weeks doing super sets and go back to the above routine.

Cheers