The start is normal, like any Inca, you advance with 16 vills and with the warrior chief, to obtain 2 travois. What I do is build a TP during the transition, then the market and then start the kancha production. Our second shipment will be American Allies, this apart from allowing us to create Caribs, Zapotecs and Mapuches in the native embassy, it provides us with a Native Embassy travois, this is OP because it already gives us an advanced rax without having to reach the second age. When it comes to commercial, the 2 travois that were given to us must be used to build 2 TPs in the closest possible native villages, our third shipment will then be Native Treaties, which will provide us with a number of native units to which we are allied , but not only the native towns on the map where we have a TP built, but we will also receive Carib, Zapotec and Mapuche units thanks to the letter from Native Allies, in the timing that happened in the REC, I get to receive the shipment when I already had the 2 TPs built, at 6 min, I got a small but powerful native army, which added to the aura that the Inca WC provides, is simply broken.
Of course, this map-dependent order, there are maps where it will have no value due to the absence of native weak or unhelpful, but on maps like Mexico or the Great Plains, I find it very powerful.
Finally, I would like to emphasize that I am not a very good player, my ELO is close to 1200 so this strategy in the hands of someone expert, I think it could be quite powerful and even deserve a nerf. I have tried it with a friend far superior to me, and I have defeated him without much difficulty.