As far as rangers and pathfinders are concerned I have the following statement I gave to another who inquired about that. 

[quote=@Ollumhammersong]
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. 
[/quote]

As far as warp spiders go... they are one of the aspects I am iffy on. [s]I will say, don't get your hopes up. Because this isn't exactly the type of mission where these guys would be useful or needed. [/s] On second thought. Leave this one with me and i'll mull it over a bit more. I may warm up to it more than I thought.

As far as the leader goes, I already stated in the opening post that I don't want other characters playing seers. Frankly more than one elder psyker power spikes this group pretty hard. 

And the leader in question I was actually going to make them a wayseer. Someone specialized at reading and navigating the webway (and thus guiding their ship in finding the worlds in question)

I hope that answers your questions.