Best Supplements for Strength Oriented Program?

Hi Coach
Hope you are doing great just a quick question if i may :

What are your go to suplements when you are training mostly for improving your strenght in the big 3? Unfortunatelly i live in the country where biotest products aren’t available.
Was thinking about creatine,quality whey protein,omega 3 fatty acids and some C-vitamin
Once again thank you for your time and help