I use that spot by where Beast Man is in that church. You give him death roots.
There are little gnomes walking around that are super easy to kill. They drop 1094 souls each. I got a path I run to hit all the gnomes, then I rest at the bonfire by the bridge where the dragon is.
That's the spot. I can get like 15k Souls in 3 minute runs. I also practice my moves and magics on the gnomes.
I got so good at the running jumping 2 handed giant sword smash. I can hit a gnome with it over and over. Before he even gets up from the first one, I'm already about to land another one.