As you know Clash Royale
is one of best MMORPG/Strategy game available for mobile phones, there are lots of big tournaments for best players, and if you want join them you need test your strategy faster. So "how to do it?", most people train their skills on private servers, because it got big boost in EXP, Coins, Gems and speed of gamplay. After test several strategies and grow your game skill, most of them back to global servers, and become pro players. So assume, you should really try to play on clash royale private servers, and sent us private message, what you think about this.