So, it is pretty much IMPOSSIBLE to get Rank 1 in Arena Rush now, with most Rank 1 players getting 400+ Points in 3 Day Rushes, and 300+ points in 2 Day Rushes while using Gems/Money, even while the rewards are not the best.
I am pretty active in Arenas myself, but there is usually about 100 points of difference between me and Rank 1 in Arena lately, due to the difference of spending gems and not sacrificing sleep.
My suggestion is that the Ranking System is modified such that once you reach a certain number of Points, you are guaranteed the Respective Rewards. So, if you get 199 Points in a 2 Day Arena Rush, but you finished Rank 1, you get the Rank 1 Rewards. Similarly, if two players get 225 Points in the 3 Day Arena Rush with no one else scoring any higher, they both get the Rank 1 Rewards.
For the 2 Day Arena Rush:
The top reward is for Rank 1 or anyone who reaches 200 Points.
The Rank 2-3 reward is for anyone who reaches 175 Points (or Rank 2-3).
The Rank 4-10 reward is for anyone who reaches 125 Points (or Rank 4-10).
The Rank 11-15 reward is for anyone who reaches 100 Points (or Rank 11-15).
The Rank 16-20 reward is for anyone who reaches 75 Points (or Rank 16-20).
The Rank 21-30 reward is for anyone who reaches 50 Points (or Rank 21-30).
For the 3 Day Arena Rush:
The top reward is for Rank 1 or anyone who reaches 250 Points.
The Rank 2-3 reward is for anyone who reaches 225 Points (or Rank 2-3).
The Rank 4-10 reward is for anyone who reaches 175 Points (or Rank 4-10).
The Rank 11-15 reward is for anyone who reaches 150 Points (or Rank 11-15).
The Rank 16-20 reward is for anyone who reaches 125 Points (or Rank 16-20).
The Rank 21-30 reward is for anyone who reaches 75 Points (or Rank 21-30).