Ok, so I'm doing a high-powered campaign (starting at level 5) over a forum, based heavily around the horror genre, and one of my characters has requested that I make his character a mercenary eldar corsair working with the Rogue Trader. However, the Adversaries and Aliens chapter of the book doesn't suggest an approximate level that the Eldar corsair stat line is at, so I'm unsure as to how much improvement I'll have to make to bring it up to level 5.
Basically, my question is this: does anyone have advice for making an Eldar character, or balancing it with level five characters?
Also, if you have advice on horror tropes to put in the campaign, I wouldn't mind hearing them.
its the awesomeness.