is this mandatory?

Ok, I better just ask because if not.... then uhh... I won't know lol
So I really need anything else besides fox farm's grow big, tiger bloom and Big bloom? like the tri pack of beastie bloomz,cha ching and open sesame? or could one get by without it? I mean would there be much of a diff? or is it more os a "quality of the bloom" not the size/quantity...?

You will be fine with just the three. If you are just starting out then KISS is the way to go. With those 3 items, ph adjusted water/nutes and LST I easily got/get 6 plus oz's dried from one plant.