Couldn't you have all the warriors under a single CAD and have the Ravagers as an unbound detachment? It's not the Ravagers benefit from Objective Secured anyway.
It saves you a whopping 20 pts, but you never know when that might come in handy, and it certainly makes the list a lot easier to read. :-p
Worry not about Chaos; it is the used 40k market that shall be thy temptation.