what is the most efficient way to create a killbox

Which solution is most efficient when it comes to making a killbox and why?

  1. Setting up a large box collider all across the scene and make the player die on collision.
  2. Have a small box collider follow the player around, still dies on collision.
  3. Specifying a value in Y to be the killzone (no box collider). For example, in 2D, if the player falls below -12 in Y, he dies.
  4. Another solution not listed here.

Thank you!

The best way in my opinion is the box collider. the reason is it is the easiest to rig and is very reliable for most situations. However specifying a Y value will be 100% reliable in all situations. -T.D.M.3