by David M. Bourg, Glenn Seemann
ISBN: 0596005555
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Have you tried using something more efficient and precise, for example a flocking algorithm?

https://www.oreilly.com/library/view/ai-for-game/0596005555/...

Neural nets and machine learning in general are good for problems whose solutions are hard to hand-code. If you can hand-craft a solution there's no real need for machine learning and it might simply take up resources you need more elsewhere.