For the most part I am treating outcasts like Corsairs, You really have to sell me on why someone who is deliberately walking a path to avoid craftworld interaction is suddenly jumping on board a craftworld launched mission they probably know nothing about. 

Plus while rangers are cool my main issue with them is that they do tend to play the more removed, anti-social angle. Which is frustrating for the reasons I already stated, and there really isn't a huge demand for snipers in this mission either.