I am not a big fan of the Armoury System. I think it is a convoluted mess that strips away the "Role" in Role-Playing-Game. All SE really did with this system is to allow people to play as a WAR/WHM, MNK/RDM, DRG/BLM or any other abomination of traditional (read effective) Party-Based Play without being ostracized, humiliated and bullied into changing their subjob.
Since our skill sets are private, we can play as any lame setup we desire and since battles are so chaotic and over so quickly, no one notices how badly someone is leaching and not really contributing. Now, I am no Elitist and I really don't care what or how anyone plays as this game is VERY solo-friendly so experiment all you want and create a Frankenstien Monster Hybrid if you wish but there will always be peer pressure (elitism) when it comes to Party-Based Content and it is specifically for Party-Based-Content that the new "Jobs" are being created for.
No Party will want a Lancer/Paladin (unless no Glads are available).
No Party will want a Pugilist/Paladin (unless no Glads are available).
No Party will want a Conjurer/Dragoon. (period)