Combining FST-7 with power training could provide you with good balance, as long as you are careful not to overtrain. I would drop the 'FST' part in favor of traditional training where you are using relatively heavy weights in the 6-10 rep range while taking 1-2 minutes of rest between sets. You can then finish off with the '7' part of the program to really exhaust your muscles and provide a 'conditioning' aspect while also increasing overall training volume.
Here is an example of what a Back workout might look like:
Shemz Back Workout:
Chins (or) Weighted Chins - 3 sets of 8
One-Arm DB Rows - 3 sets of 8
T-Bar Rows - 2 sets of 10
Close Grip Pulldowns - FST-7 's "7" (7 sets of 12 w/ 30 seconds rest)
In terms of decline work for Chest, a lot of people seem to neglect it not realizing that it is the most effective way to target your pectorals. You can use a barbell or dumbbells and you should also find that it provides a good overload since you can handle more weight on Decline than you can on Flat Bench.
Regarding the Nitric Fuel, it does contain creatine but not enough for it to be an effective dose. It does contain Beta-Alanine which stacks well with creatine. Since you already have the Nitric Fuel I would recommend stacking it with a good quality Creapure Creatine Monohydrate and perhaps some caffeine for training energy support.
The directions on Nitric Fuel instruct you to take six tablets 30 minutes prior to training. I would agree with this protocol as the tablets will take some time to break down. You do typically want to eat a balanced meal about 60-90 minutes before training and then take your pre-workout supplements 15-30 minutes prior to your workout. This can vary depending on your goals and specific supplements that are being used.
I cannot access Youtube videos on my work computer, but for rear deltoid isolation movements I would recommend face pulls or reverse cable flyes (I prefer to do the cable flyes one arm at a time).
Let me know if there is anything else that I can help you with and when I am on my other computer I will check out the videos that you posted.