11-36 10 speed Shimano cassette with a SRAM thick/thin 28 on a 29er.
Before that, ran a 11-36 10 speed Shimano cassette with a Hope 32 on a 26er.
The 29er setup is marginally lower geared than the old 26er gearing, but I chose it for very long days in the hill with bikepacking gear. A 30 tooth up front on the 29er would give me marginally higher gearing. I ran it with the 32 to start with, but found the low wasn’t low enough for ‘bale out’ gearing.
The SRAM XX1 cranks and chainring are great. I am considering going 11 speed at some point, but no way am I paying £250 for a cassette, that is going to need to drop down in price a lot, and remain competitive weight wise. before I’d go with that.
Front derailleurs are the work of the devil. Horrible horrible Heath Robinson things. Ugly, mechanically questionable, impractical, unnecessary.