PvP tournaments. Each tournament is limited to a certain number of points 24800.
To make it more competitive over the 6 days the tournaments run for, have all points scoring and use it as a league table, same as you do for Kingdoms with their weekly kingdom totals. Or the tournaments that last 3 days.
By having all points scoring it will keep players wanting to try and keep high scores going. You can the assign diamonds, or Crowns to the rankings.