Yeah watch the cadence and the type of chain you're using may also be a factor. I've just got a SRAM X01 chain to replace the GX Eagle one which came standard on my Rail 9. Apparently it's a much better option and will hopefully preserve the life of the GX cassette.
Just got Assegai 29 x 2.5 Exo + front and DHR II 29 x 2.4 DD rear on my Trek Rail 9. Tried them out on winter clay based trails and the Assegai is incredible. DHR got a little loose sideways off camber and over wet roots but amazing under braking and when climbing. Money well spent replacing...
This is the combo I'm looking at putting on my Rail, but also wondering if going wider with 2.6 Exo+ front/rear might be a better option as I'm 100kg. Any advice would be appreciated. I'm in Auckland, not riding anything too gnarly, rocky etc.