Corpsmen and medics carry a mobile emergency room strapped to their backs along with their weapon systems — and it gets heavy. After going through months of intense medical training they can probably apply a wet tourniquet in the pitch black with one hand while under enemy fire.
Truth is, they can't be everywhere at every moment. Make no mistake, if the medical staff could take care of everybody and send them home in one piece, they would.
If humans had special powers, these are the one's Corpsmen and medics would want to make their jobs easier.
1. X-ray or heat vision
There's no better tool for quickly checking for fractures or cauterizing bleeds.
2. Mind reading or telepathy
Corpsmen and medics not only have to care for the good guys but the bad ones as well. It would be badass if they knew who not to waste their time on if they knew who wasn't really injured.
3. Teleportation or super speed
During a mass casualty, "Doc" is outnumbered by the number of people he or she needs to care for. Being able to render care swiftly and take them to medical in a blink of an eye would save time and resources.
Being pinned down in a firefight is crazy dangerous, but if bullets and mortars just bounce off of you running out in the open to save your comrade ain't sh*t.
5. Super Strength
Because picking up heavy crap is important.
During the chaos of battle, you can find yourself far from some supplies you need. So what better than to stretch out an arm to grab a bandage that happens to be several meters away?
Why run out into a hail of gunfire if you can just drag the casualty to you?
Hauling sick and injured people from A to B can get pretty exhausting if you're out of shape.
9. Super intelligence
Because being smart rocks!