The best replacement for gladius is sv650.

The best alternatives to gladius are rated as following:
★★★★★  sv650
★★★★  blazefire saber
★★★★  katana
★★★  spatha
★★★  lionheart
★★★  gladiusex
★★★  rorarius
★★  axis blade
★★  edged carbine
★★  xiphos
★★  er6n
★  versys
★  kopis
★  proximo
★  surefire
★  kawasaki er6n
★  fz6r
★  cb400
★  hauteclaire
★  bandit
★  er-6n
★  viking sword
  iron sword
  blazefire
  ducati 696
  rorarii
  sv
  broadsword mabinogi
  falcata
  broadsword
  skull earrings
  696
  er 6n
  surefire ultra

Your alternative for gladius is not listed? Suggest!
Speaking about gladius, one probably shouldn't forget about dr tracker.

Other search terms related to gladius and their ratings are:
★★★★★ dr tracker
★★★ diminishing return
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gladius
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