Nowadays, you can get 50-80 points if you are in a group and you have all of the buffs including the store buff. If you're soloing, that number can go as high as 300-500 for each player you defeat.
I've been playing in PvP since 2008 and just hit Rank 10 recently, yet I see other players that have only been in the game a few months and have already passed me up.
What happened to "Ranks weren't meant to be achieved easily", Turbine?
20/80, Turbine. 20/80. Might want to research what that means.