In regards to existing classes for new jobs with daggers, I was actually thinking there is ALREADY a dual handed wield class: Pugilist! Thus that will be the main class with either Marauder or Lancer as sub. Guns job will have Archer and either Lancer/Marauder or Thaumaturge as sub depending if SE would like pure ranged DPS method or ether magical guns job.

Again this is simply my own analysis and is definitely up for all kinds of debates but I am glad that SE are looking at all possibilities!