Do I need to retake?

I just got my scores back for the May sat II test.

Lit- 690
Math II- 710
US History- 790

How heavily do schools weight subject tests? Can they be the defining characteristic between acceptance and rejection?
I’m applying to Duke and I know they require subject tests, but I was just planning on sending my ACT score. I’m also applying to UVA, which only recommends subject tests.
Would doing well on the tests (750+) make a significant difference?