User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-121.219.102.78-20130402013612/@comment-119.93.94.59-20130402022007

Well, if I remember correctly, some armor sets in P3rd had different skills for low rank and high rank. Example is the Agnaktor Set, which was a pretty solid Lance/Gunlance set for low rank. Then gets kinda crappy, but more flexible, at high rank.

He probably meant those.