Monster, Monsteur, Monstour , 26/29+ and Expedition and Adventure bikes

I believe DA levers don't pull enough cable to work with SRAM 10-speed derailleurs. You'd have to bodge something together (assuming you want a wide-range cassette) with either a Shimano MTB derailleur or a 10-speed road derailleur with a long cage - I don't think they exist.

It would work in friction mode with an MTB derailleur I expect though.

Now here’s where things get tricky, as more gears are added and everything gets closer together, tolerances get tighter. This means that with a little bit of dirt in the cable system, the derailleur doesn’t quite move as far as it should, and all of a sudden you’re in the wrong gear and your bike is ghost shifting like crazy. Enter Shimano Dyna-Sys. In the simplest terms, Dyna-Sys increased the amount of cable pulled and decreased the amount of derailleur movement per millimeter of cable pull. Because Shimano 10-speed road is the same 1.7 ratio as before, lets compare the 10-speed Shimano road to the 10-Speed Shimano Dyna-Sys mountain. The cassettes are the same width, with a cog pitch of 3.95mm. But the difference is that 10-speed road pulls 2.3mm of cable, compared to the 3.4mm of cable that Dyna-Sys pulls. So in order to end up in the same gear after a shift, the derailleur ratio is reduced from 1.7 to the new Dyna-Sys 1.2 ratio. The main reasoning behind this design change is that with more cable pull, a turn of the barrel adjuster gives much more incremental fine-tuning. Dyna-Sys allowed Shimano to squeeze 10-speeds into the same freehub body and still maintain quality shifting that stays in-tune. While I can’t speak for the engineers, I would say that Dyna-Sys was considered not necessary on road systems, because they weren’t being beaten around quite like a mountain system, until 11-speed road was introduced. Now the Shimano 11-speed road systems have a type of modified Dyna-sys that keeps them in-tune with tighter cog spacing but is completely incompatible with 10-speed road or mountain.

From here

Edit: it might work with a 9-speed MTB derailleur, 10-speed DA shifter and 10-speed cassette. But then you have to go all the way back to 9-speed and I don't know if you get the nice features like clutch mechs. Really Shimano have totally fucked it when it comes to 1x drivetrains, wide-range cassettes, anything gravel-related. They seem to think (until now) that everyone should be happy with 11-28 cassettes and reducing the size of your chainrings until you get a low enough gear. No you dicks, I want 34/42 and 50/11 on the same bike.

Tell me more, tell me more...