I feel like there is still a strong desire for a dual wielding gun class like that of Admiral Merlwyb, so maybe a dual wielding light crossbow user would be a nice substitute. I imagine it being acrobatic like Diablo III's Demon Hunter. I would be happy with a standard size crossbow user as well though since I feel like that would suit the aesthetic of the Ranger job more. Either weapon type is something I definitely would like to see.