Using the right balls is every bit as important as using the right clubs in Golf Clash. Using special balls too early will put you at a disadvantage later in the game, and using a ball with the wrong attributes will not only waste a ball that could be useful, but can also put you at a disadvantage for that hole. Learning these points of the game can give you an advantage and help save you some pain and aggravation.
Starting the game, you won't need to use any special balls. Let's repeat: "I will NOT use special balls before I hit Tour 5". Even then, being the Golf Clash God that you are, you can probably continue using basic balls through Tours 5 & 6. At most, you can use a Marlin here and there to deaden a head wind or get a little spin with a low level Extra Mile which lacks curl. This is the time to build a reserve of special balls that you will definitely need when you get to the higher tours.
It's fairly common to see Quasars and Navigators on Tour 7+ and that's the first time you should be using them. By that point, your free, pin and 1 vs. 1 chests will cover the cost of them in the shop. Only in the most extreme circumstances should you consider breaking out a Katana or Titan. You're much better off saving those for higher tours and tournaments.
Speaking of tournaments, that is the absolute best way to build the stockpile of balls that you'll need. Finishing in the top 10 or 25 in a couple tournaments will get you well on your way to where you can use the balls you've won to win more (and better) balls in the future.
Individual Ball Details
Pot O Gold