If it follows the same formula as airships you'll need at least 90 surveillance to reach the further sectors. Beyond that:
Surveillance increases your odds of finding something
Retrieval increases how much of it you get.
Favor may or may not have something to do with getting rarer mats or HQ vs NQ; I've seen people talk about it but haven't seen anything confirmed about it.
Range increases how far you go, IE more sectors per trip.
Speeds is simply how fast you make the trip.

Most profitable builds seem to focus on maximizing Surveillance and Retrieval with a Range good enough to hit multiple sectors in a trip. Speed is more of a luxury, nice but not worth sacrificing the main stats for.