I don't know why they couldn't just use their actual weapons and armor.
And I prefer the role-archtype style of classification:
Defender, Leader, Striker, Controller.
For the Grognards: Meat-shield, Healer, Skirmisher, Nuker.
And for the uncivilized MMO players: Tank, Healer, DPS, Nuker/Debuffer.
Not all healers are unarmored and helpless, not all wizards are squishy.