** top right is recommended for boss battles (seems to give the best attack boost)
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** Top right (Alert) appears to increase evasion and shelling power of the second fleet.
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** bottom left seems to work like Diamond formation (even has the same name)
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** Bottom left (Diamond) increases Anti-Air defense.
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** bottom right is recommended for regular nodes
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** Bottom right greatly increases the evasion and torpedo accuracy of your second fleet while preserving the shelling accuracy of the first fleet. Recommended for bosses.