No plug-ins required:
https://www.youtube.com/watch?v=cC3oVwYehd0
Draw the path in Illustrator, copy & paste it over/ import it. this has the added benefit that you can simply copy& paste the path to the positions of the arrows as well without extra work beyond adjusting the timing. Soem time well spent in AI can save you a ton of work in AE.
Mylenium
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