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As much as I'm happy for League to finally show up in the show, the research is very flawed. Using Braum and Lux as measures is quite bad considering they only met Jinx in a promotional cinematic for the mobile game, and said cinematic isn't canon, which also means that portal thingy isn't canon. It may not be too much, considering she can, indeed, match Vi's weaponry in League's canon (which, btw, is different than the Arcane canon) and Vi's gauntlets are ridiculously powerful, but since they do "calculations", something could have changed there.