Choose your superpower

flying hands down.

both other options has draw backs out of the persons control.

invincible: if you get seriously ill and had to live another 20-40years in pain until you reach a natural ages of death
invisible: this would only work if you can do into a soul like state- which means you cant feel anything pleasure or pain, seems pointless

Why? you can still get ill and die or be run over and killed by a bus two minutes after your maiden flight.