New to Comeptitive 40k, Assassin detachment question. Can I take a single assasin in a list and still use stratgems for it. If so what allows it, I know it states it can be taken as part of a vangaurd detachment, but does that mean I need to cough up the points for two more to gain access to them. I don't want to use command points for an option, I want a perminent inclusion of one or two. Thanks!