The standard configuration should be cat's eye gems, laser gems, and bombing gems.

Cat's Eye Gem: A special gem for the Cat Gun. It is also very practical. It is equivalent to free running cats in multiple lines, and the cooling time is relatively low (compared to the Aries Elf). A 6-star cat's eye Gems allow you to use at least 2 of them in a battle, and if you have 8 or 9 stars, you can use 3 of them. And the number of rows of running cats is related to the level of the cat's eye, 1 star is one row, 2 stars are two rows, 3 stars are three rows, 5 stars are four rows, 7 stars are five rows, 9 stars are six rows, 10 stars (full) are seven rows (full) , compared to the Aries Elf, which has the same functions, its price-performance ratio is horribly higher. It has the same functions, but its damage is significantly higher than that of the Aries Elf, its cooling is far lower than that of the Aries Elf, and its attack range is much higher than that of the Aries Elf. Get it. The method is also obviously simpler than that of the Aries Elf (cat's eye gems can be dropped randomly in volcanoes, while the Aries Elf can only rely on money or a superb European Emperor character), so the first slot for the Cat Gun must be installed. Cat’s Eye Gem, and it is best to have Cat’s Eye Gem. Of course, if you are not particularly rich, upgrading to level 8 is basically enough for you.

Laser Gem: Its function is to emit clearing lasers. Its damage and functionality are second only to cat's eye. It also has the fastest cooling among all gems. It can be used interchangeably with cat's eye, which is more troublesome in some cases. It can bring about a turn of events, and the way to get it is simpler (randomly dropped from the temple). It is recommended to upgrade it secondly and give it the second position. Moreover, when it is upgraded, it will simultaneously reduce the cooling time + increase attack damage + increase the number of attack lines, which is the same as the cat's eye stone (but the cat's eye is obviously more domineering, after all, the laser cannot drop a giant rat with full health in seconds~), and its attack line The conversion rules between numbers and gem levels are the same as for opal.

Bombing gem: Its function is to appear bombs in the front row. The damage and attack range are very considerable. The cooling rate ranks second among all gems, but it has shortcomings. For example, its attack range is limited to the front row, and 5 huge explosives appear at the designated location. Upgrading can only reduce the cooldown + attack damage, but cannot increase the attack range of each explosive, nor can it increase the number of explosives. , that is to say, its attack range is fixed. Compared with the first two gems, it is less flexible. Pay special attention to prediction when using it. When the front row is already in a mess, you must click it without hesitation. It can play its maximum role and easily solve the immediate trouble.

P.S. Laser gems and bombing gems will not cause damage to the canned rat, but will activate its passive and help it jump! Just be aware of this when using it and think about whether it's worth letting the canned rats jump in.

The above are my suggestions for reference only. If there are any functions, I can explain them in more detail (such as the use of arenas and magic towers).

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Hope it can help you~