Advice on my stack

I got an really important exam in a few weeks (university admission) and I really want to be at my best possible mental state in the day of the exam since it will be a great deal in my life.

1. I've used modafinil a few times to study in the past and it was GREAT but it only keeps me awake and aware and I need more than that.

2. Phenibut. Let's consider I use it in the perfect dose for me to provide anxiety relief, which I usually have in exams.

3. A stack of nootropics which I've heard is quite good: pramiracetam, choline and l-theanine.

Probably overkill, but I also consider coffee. I know coffee and modafinil can mess you up if not taken rationally, but let's say 100 moda and 100 caff.

What do you think should be added/cut from the list? How should I be taking them and in what order?? Any other recommandations??