So which site gives the best statistics?

• Champion.gg updates infrequently
• Op.gg, what was the most reliable, seems to copy the statistics of Korea for every region and has been that way for 3 months
• lolalytics i don't know much about
• lolking is complicated to read and doesn't give the best statistics for builds.

What site is good right now? Op.gg still feels like the best but again, if you look at Korea's stats and switch to NA or EUW they're the exact same.