The best replacement for arnis is kendo.

The best alternatives to arnis are rated as following:
★★★★★  kendo
★★★★  silat
★★★★  escrima
★★★  fencing
★★★  kali
★★  eskrima
  nunchaku
  kombatan

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Other search terms related to arnis and their ratings are:
★★★★★ arnis
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arnis
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