Got the waypoints to work completely, without navgoals, without point_combats. It seems I just didnt create enough of them and they were too far above the ground.
And what really helped is to name them all 'Waypoint' instead of giving them a naming order like Waypoint1,2,3. This really reduced the workload, because then I could just select 10 waypoints who were all connected to eachother with the name 'Waypoint' and clone them allowing me to quickly fill up my map 🙂
I can now close this thread a happy man. Thanks for the input 😉
Wundai's post in Creating Waypoints in existing maps? was marked as the answer