Boom it from above if you can. Generally, overhead miking will yield the most natural sounding dialogue with the least amount of mixing and editing effort. It provides a pleasant blend when there are multiple actors involved. Two, three, even a small group of people interacting can all be recorded from a single mic. A mic on a fishpole or boom allows for a fair amount of physical activity and movement by the talent.
Actors are free to enter and exit a scene, move around, jump around, climb around, etc.
There are no trailing mic cables to inhibit their range of motion. Nor are there the frustrations of dealing with finicky wireless mic systems with their inherent problems of environmental RF interference. An overhead mic will pick up sufficient sound effects, footsteps, and hand-prop noise to give the soundtrack a full texture. Because the faces are closer to the mic, dialogue will dominate the track, but other sound effects will still be audible. Audio perspective is easier to maintain with an overhead mic.