How about Ninja/Nightblade as 5th class ? Everyone assumes that a Rogue/ Ranger/Archer is the 5th class, but thinking a little outside that box, the Ninja/Nightblade Archetype is just as valid and perhaps a bit more "exotic" to fit the flavor of DIII. The obvious reason that this could "fill" the role of a ranged and melee class with some magic abilities. In terms of past Diablo classes, it might most closely resemble the Assassin. Likely it will be named something other than "Ninja" and have a lore/background consistent with the exotic DIII world. The reason I have for this speculation is that a Stealth based fighter/ranged attacker with some magic-like abilities would allow for considerable flexability in terms of class build. Obviously Bows, throwing stars, and throwing knives would be a primary class skill set. Swords, Polearms, and other exotic weapons would be the melee choices for this class, but it would focus on quick stealth based melee kills, as the class would be weaker than the Barbarian or Monk when facing hordes of enemies directly. Other skills might involve camoflage and/or invisiblity magic like abilities. Skills designed to kill or incapacitate a single enemy quickly when a stealth melee attack is performed. Finally, escape and evasion skills such as a flashbomb/tumble behind enemy skill, and leaping/dodging skills to avoid enemy attacks and missile fire. This Class would be one of the fastest moving classes, as it would use speed instead of armor or spells to soak damage. Anyway, that's my 2 cents.