Implement some sort of punishment for sprinting back to safety portal border over and over every time you start losing a fight. Have seen servers ban, add plugins, etc. Just a thought to make PvP a little less stale. Could even do something simple like add a porting timer to get up a ledge to the portals. That way when you jump down, you can't get back to safety at any second that you start losing.
Yours truly,
NCH
Yours truly,
NCH