1. Choose turrets : In this level, it is mainly recommended to use deceleration towers and range damage towers, such as fans, airplanes, radars, and bubble towers. Another way to play is to use strong output and poisonous needles to slow down, such as multiple arrows, magic balls, poisonous needles, etc.
2. Opening layout : At the beginning of the game, arrange two multi-arrow turrets. If you find that the damage is insufficient in the middle of the game, you can supplement the output and poison needle slowdown.
3. Expand the turret : You need to start from the middle and then expand the turret layout to both sides. The specific layout sequence is shown in the figure below.
4. Clear corners : Add a turret on the outside to clear out enemies in corners.