It mostly depends on how I'm feeling.

Like when I'm feeling a little bit irritated I would choose poison.

If I'm being my regular crazy self if would be a chainsaw or ax or fire.

But if I was being logical it would be a shovel Because there's less of a mess and right after you kill them you can bury them

This is a random thing I wanted to post. And no I don't have access to an ax, or a chainsaw. But I do have access to fire and a shovel and poison