What's the best mix of new Shimano XTR, XT, and SLX?

12-speed Shimano XT and SLX is here and it's almost as good as XTR

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XTR has same weak spots as XT, SLX and Deore. Bike Service School - all about Shimano rear mechs.

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What's the best mix of new Shimano XTR, XT, and SLX?

MTB Product of the Year - Long-Term Review of Shimano's 12-Speed Deore Group - Mountain Bike Feature - Vital MTB