The best solution is to create your own server and make it the most popular in your part of the world. Then you have the lowest ping compared to other players
GL!
PS. And yes when you have 500 ping to Repka it degrades performance for other players. There are no known tools to limit allowed ping unfortunately yet but when they are available we would limit ping by 350 or 400 max I guess to provide a more stable gameplay for other players.
I think I have seen a well-populated Australian server some weeks ago btw.