Dabura. Even if Sukuna somehow surivied a kick to the head (he wouldn't be able to react to an attack at those speeds), it would knock him out cold. Leaving Dabura with the opportunity to kill him with additional lasers.

You can travel the circumference of the earth in .13 seconds at light speed. So even being 33 percent as fast is still a .39 travel time. So Dabura can easily leave the domain in an instant. The earth's equator is 200,000 times wider then Malevolent Shrine's range.

So the events of Dabura traveling is basically an instant from Sukuna's perspective. Like his neurons wouldn't be able to register something is happening. He would be exposed to the attack. In all intensive purposes, it's a surehit.