I also find the thing about not lubing the sliders to be weird. Presumably, they are encased in rubber boots that protect them from the elements? If not, I would find that weird too, but would reluctant to coat them in a dirt collecting substance…
As for the torque specs, Haynes can’t always be trusted, but they put the torque specs at the front of the Chapter. So did you look there?
And the advice re: the bracket bolts vs caliper mounts is correct. The brackets are generally over 100 ftlb (I have a GMC Envoy where the fronts are 150), while the caliper mounts are way down low. More like 20-30 ftlb or even less (especially in the rear).
Here’s a thread where someone posted specs for a 2015 - probably the same as for 2017, but it also didn’t say where the specs came from. So I’d double check it: Front & Rear Caliper Bolt Torque Specs Needed | Dodge Durango Forum