My partners Troll runs this
https://www.bike-discount.de/en/buy/...ctalink-658383 with the 22 replaced with a 20T (which takes a bit of filing of the spider and the bolt heads to clear the chain plates)
https://www.amazon.com/aMTBer-20T-Ch.../dp/B00CDW9CC0 and a Sunrace 11-40T rear
SunRace | CSM980 It works OK with the standard Deore rear derailleur, but needs a new front one to suit the 40T
https://www.bike-discount.de/en/buy/...p-swing-209816 It's able the cross chain both ways, just! Really huge gear range though, over 800%.