Seriously there probably needs to be more spots to powerfarm people. Takes a month for about 300k SP, but sometimes the boredom and people killing you with Ongs will piss you off.
So do what I do, if I happen to see somebody kill me with an Ong, I have a "Death Note.txt" file on my computer. I write down their name now, destroy them when I see them later, all nice and farmed.
