Do you agree with the list? Anything can be added/removed?

> Amplifier Artifact: Many champions have kits which don't really kick into gear until they reach a "core build", a fundamental combination of items that matches their stats and abilities. This creates a "power spike" when they reach that item which often allows their team to seize an advantage by leveraging their new power (note that Jax appears several times on this list): > > Kayle: Nashor's Tooth (used to be Guinsoo's Rageblade when she was still a dedicated hybrid champion). > Ezreal, Corki, Nasus, Jax, Lucian, Irelia: Trinity Force > "Blue" Ezreal: Iceborn Gauntlet > Vayne, Kog'Maw, Twitch, Jax: Blade of the Ruined King > Ahri, LeBlanc: Morellonomicon > Kennen, Fiddlesticks, Lissandra: Zhonya's Hourglass > Ashe, Caitlyn, Varus, Tristana: IEPD, the combination of Infinity Edge and Phantom Dancer. > Ryze, Kassadin, Swain, Anivia: Rod of Ages and Tear of the Goddess/Seraph's Embrace (note that the "power spike" actually comes into effect when these two items have finished charging up, not when they're initially bought) > Fizz, split-push Twisted Fate: Lich Bane > Riven: Bloodthirster/Ravenous Hydra > Akali and Jax: Hextech Gunblade > Yasuo: Statikk Shiv, Infinity Edge > Jayce, Urgot, Yorick: Manamune/Muramana > Rumble: Rylai's Crystal Scepter > Vladimir, Mordekaiser: Hextech Revolver

From TVtropes

If Jax also has Gunblade how come the meta doesn't?