I would like to ask what the purpose is of these characters. Both Darren and this elf seem, on the surface, to clash pretty hard with the Warhammer setting (and if they do turn out to be traitors, you don't have to foreshadow it this much :P). They don't seem to bring anything to the table other than leading us by the nose to a location we were headed for anyway. Having the elf be unbeatable is starting to look like what us tabletop nerds call railroading, although I don't see why that would be necessary, when we're happily following the plot already.