I'd personally just move from town to town or country to country killing individuals with time breaks inbetween killing and using different methods of killing. Serial killers on average make a higher death toll, and suffer less consequences than spree killers, since they pretty much always either get caught or kill themselves, but serial killers can go uncaught for years.
Are you ready for the fire? We are firemen. WE ARE FIREMEN! The heat doesn’t bother us. We live in the heat. We train in the heat. It tells us that we’re ready, we’re at home, we’re where we’re supposed to be. Flames don’t intimidate us. What do we do? We control the flame. We control them. We move the flames where we want to. And then we extinguish them.
Impersonation is treason.