This outpost hangs near the edge of a mountainside cliff. There’s only one watchtower here which is within bow range if you start off from the rock cliff where the zipline is connected. This makes this spot an ideal starting point for any difficulty since you have a good vantage point to scout most of the enemies while having quick access in via zipline.
The painted house in the middle has a grassy space under the floorboards as well, making it an ideal hiding place when enemies got spooked or started searching. After getting rid of the rear guards and patrols, it’s pretty much an easy task to wipe the remaining enemies.
In the highest difficulty, the two enforcers will be guarding the watchtower and the rooftop of the rear house which will make sneaking in a lot harder. If you have a bow powerful enough to one-shot these guys, you just need to go to the same vantage point mentioned earlier and pick them off from there. Once these guys are gone, it will be a lot easier to deal with the remaining opposition.
You can refer to the sample videos below on how to achieve undetected or at least "No Alarms" liberation. Due to some random factors out of your control, like random animal attacks or friendly NPCs wandering near the outpost and triggering a response from enemies inside, you should adjust your strategy accordingly.