Just throwing in my .02 here, if you could only pick one of those 4, I’d recommend Micro-PA.
Micro-PA is an incredible supplement, I’ve been taking it for years and noticed visible results within weeks of starting it. Utilizing Micro-PA properly would include maximizing TUT (time under tension) through slower negatives than you might be used to, and a great mind-muscle connection. In my opinion a bodybuilding style training split would be ideal to see your best potential results for building a physique, and utilizing Micro-PA. I think Micro-PA will help more than anything else regarding building muscle, which makes it easier to lose fat and accomplish your goals.
As a further thought, to maximize the muscle gain and fat loss, if you can, throw in Carbolin-19 also. Budget wise it’s not a significant purchase, and taking Carbolin-19 first thing in the morning, and later in the day, in addition to Micro-PA before your workout, would be a fantastic stack to help you accomplish your goals (assuming your nutrition and training are already on point and consistently executed!)