LIke, can he use super vision in space to see a bank, and then use microscopic vision to find the valt key hole, and then use heat vision to melt it? from space?

Or, i dont know, use super speed heat vision and ice breath to create a high way lane?

Or super speed and super strength to make a diamond person?

can he mix then?

He can mix them yes.

It's probably like multi-tasking. I can walk, chew gum, juggle, and lift weights. However, I cannot do all of these at the same time. But I can walk and chew gum at the same time. I'm sure there is some point where he can't do anymore, but that point would be way above an average point because he is Superman.

He mixes them all the time... flight is just levitation and superspeed... and his arctic breath is just a variation of superbreath, he's also been able to use various vision modes at the same time.

He once saw the entire electromagnetic spectrum,He used all his visions to obtained that type of vision.