Dark Angel Doomposter here

Where the fuck is the synergy in the list building? The legion trait is not a force multiplier in any sense. The aux detachments do NOTHING. I've started looking at veteran assault squads but even then only the Sgt can take a legion sword, and the others are essentially fucking mooks compared to the exact same unit from any other legion. I'm trying to make it work but there's fucking nothing left to work with. We get a bonus for using swords in duels? Great. Once per game my generic praetor with obligatory Terranic Greatsword might make use of that "Rite of War"