it's easy to be manipulated in this game tbh. Totally an example like:

I got the most active guild and a manager inside the guild so I can offer them gold to boost my points pretty easily and there you go you got to top. (Not referring anyone, just to make things clear)

Also APs system does the job pretty well already imo for PvE and the only reason we missing PvP leaderboards is that people making dummies to climb on kills or on ranked PvP. It's what it's.