will there ever be a dps war?

[Alistaire]

If by duel war, you mean a dual-wielding WAR, then I would say most likely no as that would require a different weapon setup than WAR or MRD which would not work with the way the class/armoury setup works in this game.

However a DPS class coming off of MRD, such as Dark Knight or Berzerker or something like that is both possible and fairly likely. I personally hope for Dark Knight.

Not quite true. It'd be a bit different than what any job uses right now but not far off how GLD uses both swords and daggers, and WHM/BLM uses 1-h weapons + shield or 2-h weapons.

So WAR would just get 1-h weapons which would allow them to use 1-h offhands. No change in the system required.