Get rid of true damage so that builds actually matter.
I shouldn't be dying to a Yasuo in under 1 second when I build four fucking armor items because he does 17 million true damage and just negates my entire build. It's actually fucking stupid and makes the game pointless.
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He doesn't need double crit, Infinity Edge already does that.
He doesn't need 50% armor pen, Infinity Edge + Conqueror does enough