So, this is my first army and I've been toying with it for a while, but I don't have any practical experience and am mostly going off of YouTube and Goonhammer for guidance. My concept is a XIII Legion force that got brutalized at Calth and is rebuilding in some unconventional ways, like secretly taking in deserters from other Legions (presented here as Inductii). Before that, they were siege specialists, hence the focus on breachers and explosives. Due to their underdog status, I've intentionally avoided any legion-unique units.
I worry that I might be pumping too many points into suboptimal units; some of these investments are more negotiable than others (for instance, the breacher sergeant with a thunder hammer is just kind of a cheeky "because I can"). One conundrum is that I don't know if any of my many scoring units are that suited to guarding any backline objectives.
Any feedback is appreciated!