I think sight trumps all of them.
I put zero effort now into scent control and I have had so many deer walk happily downwind of me near my stand on so many occasions, with zero reaction. These deer are potentially used to smells of people living in a rural (but not desolate) area, but at least the ones I've seen go from upwind to down they just don't care. Just because deer's smell is incredible doesn't mean they key off everything weird as a threat.
I've had a vanishingly small number of deer look directly at me because I moved, they pause to continue looking, and they subsequently forget me and continue on. It's happened but it's rare; they either leave immediately or they do the head-jerk around thing for 10-15 minutes seeing if I'll move again--meanwhile I have no chance in the world of taking a shot because they are staring the whole time.