2, four-corner diamond formation, but the opposite angle is not smooth and there are many fried points. It is difficult to guide with bombers. This 8-player formation is also the most recommended.
It can be seen that this formation sacrifices a vault and two reservoirs, ensuring the safety of most resources. Because Babun has little demand for water, it is understandable that the reservoir is outside.
No formation is omnipotent. This formation is very effective in resisting the celestial fertilizer flow, but relatively speaking, it is not so powerful in defending the celestial soldiers, and the later black fertilizer flow can also crush this formation, so this formation is not particularly suitable.