Always try to time the random roulette selection at the end of the level to land on the rangers.

You can also obtain rangers through the Gacha machine by spending friend points or rubies.

Collecting all rangers in specific set will give you 5 rubies.

To level up your rangers, fuse extra rangers into your original ones. The surviving ranger will become stronger. If you combine a base ranger with the exact same type, the maximum level of the base ranger will increase. If you use a different kind of ranger, the base ranger will only receive experience up to their current maximum level.

Rangers have five different varieties. Make sure you keep a balance of each type.

Health: Very high HP and are useful as frontline fighters.
Attack: High attack power (usually ranged), but low HP.
Speed: High attack and movement speed.
Balance: Balanced health, attack and speed.
Splash: Have attacks that hit multiple targets in a small area.