One thing that you have to understand is that all grows are not the same. You and I could have exactly the same setup, nutes, and plants, and go by the same methods, and you will end up having to change your grow from mine slightly to significantly to have as good results as me. This is because every grow has its own unique environment and conditions, and each individual will work better with certain methods and procedures than others. This is the nature of the,, well nature
That said, what you have is the basic lineup which should work just fine and give you good decent results. From that point, you will have to dial in your grow by adjusting the methods and procedures to maximize your potential. This takes time to achieve, so starting out with the basics and not complicating it with lots of tricks and additives, is the absolute best way to go (IMO) The 3 part nutrients will give your plants nearly everything they need to get from start to finish, with the one exception being the need to add the calmag additive, but this is a staple for soilless or hydroponic growing due to the lack of availability of those nutrients in the hydro realm.
The only other things you will need are, as said above, pH adjusters (pH+/pH-) and pH meter and TDS meter so that you can properly monitor the pH and keep it in the operating range of 5.4-6.0pH, which is the life or death of MJ in hydro.
I have never needed to use H2O2 in my hydro grows. I recognize its importance, and I think it is good to have that and some SNS on-hand in case it is needed. I have ffound however, that if I keep light out of my hydro system and maintain 65f-69f I have virtually no problems with any algae growth.