Well can you kill L1's easily?
Here's how I made Leader Board one day..
I went to Tortuga Graveyard and killed all the "Low Level" skeletons, usually in ONE shot.
I know, how bad of me, but I didn't even know about the Leader Board until the next day when I was told I made it by a friend, checked it out, and sure enough, there I was!!
Well, that was my first and last time, I KNOW I made it.. I was shooting them for the fun of it though.