LordTyphus wrote:if I were to run just a squad of 3 (I'd want more than 3)
Personally, I don't see the point of having only 3 Wraiths.
Obviously they won't be able to do much more than be a speed bump, and that's an absolute waste of one of the best units in the codex.
(if you actually want them to be able to DO SOMETHING other than stand there and tie up enemy squads, the minimum is considered 5).