Jeff Carlsen
Adventurer
The rarity system is almost certainly going to be organized by how controversial the class is.
Common
Cleric
Fighter
Rogue
Wizard
Uncommon
Barbarian
Bard
Druid
Paladin
Ranger
Sorcerer
Rare
Assassin
Monk
Psion
Warlock
Warlord
Warlord might be uncommon, due to popularity and general thematic appropriateness. I think monk will be rare because it's a little out of place in a traditional fantasy setting.
Priest may be a subclass of Cleric. If not, it's probably uncommon.
Common
Cleric
Fighter
Rogue
Wizard
Uncommon
Barbarian
Bard
Druid
Paladin
Ranger
Sorcerer
Rare
Assassin
Monk
Psion
Warlock
Warlord
Warlord might be uncommon, due to popularity and general thematic appropriateness. I think monk will be rare because it's a little out of place in a traditional fantasy setting.
Priest may be a subclass of Cleric. If not, it's probably uncommon.