There are 12 classes, and 12 races in each of Horde and Alliance.
So, you could have one of each class and one of each race for a total of 24 characters, using each race and class once only in each faction.
If this limit was in place, what classes would you choose for each race?
Assume for this that DKs can be any race or Allied race, even if you haven’t actually unlocked that in game yet.
Remember, your Nelf and Belf will both be a DH by default, so you actually only have 22 choices to make.
Edited to add in a possible matrix, Not really sure of some of these choices but it’s an example:
Alliance Horde
Demon Hunter------ Night Elf-------Blood Elf
Death Knight--------- Human--------Troll
Druid --------------------Worgen----------Highmountain
Hunter------------------Dwarf ------------ Mag’har
Mage--------------------Gnome------------Nightborne
Monk -------------------Pandaren---------Pandaren
Paladin-----------------Lightforged-------Tauren
Priest -------------------Void Elf------------Goblin
Rogue-------------------Kul Tiran-----------Vulpera
Shaman----------------Draenei------------Orc
Warlock--------------- Dark Iron-----------Undead
Warrior-----------------Mechagnome----Zandalari