Reclasses

Warrior Reclasses:(7984 - 7154 combined pk record for Warriors and Warrior Reclasses)
Ranger
(Warriors trained in nature, survival and tracking)
Barbarian
(Big warriors trained in the roughest frontiers, they detest magic)
Swashbuckler
(Nice dressing quick witted swordsman. Charming, yet dangerous)
Armsman
(Master of Arms, a master with almost all weapons)

Thief Reclasses:(6572 - 4854 combined pk record for Thieves and Thief Reclasses)
Assassin
(Trained in the art of assassination and the martial arts)
Bandit
(Professional thieves, better adept in the art of "obtaining")
Nightshade
(Masters of Stealth and Stealth based attacks)

Mage Reclasses:(2778 - 4523 combined pk record for Mages and Mage Reclasses)
Witch (female) or Warlock (male)
(Witchcraft training at its finest, create many potions to throw upon victims)
Illusionist
(Masters of Illusions and deceptive magic)
Enchanter
(Enchanters of items and weapons and conjurers of magical beings)

Cleric Reclasses:(7680 - 8167 combined pk record for Clerics and Cleric Reclasses)
Crusader
(great holy fighters, normally mounted)
Druid
(Worshippers of nature, powerful magic users)
Shaman
(Barbaric witch doctors, powerful and frightening spells)
Priest
(Priests of the Gods, holy and faithful)

Bard Reclasses:(3394 - 2581 combined pk record for Bards and Bard Reclasses)
Jongleur
(Acrobats/Jugglers)
Charlatan Guild
(Trickster/Con Artist)
Skald
(Singing, Chanting Warriors)

Clan/Kingdom/Other Specific Advanced Guilds:

Battlerager (Wargar)
(Dwarven Berserkers, one of the most deadly classes)
Runesmith (Wargar)
(Dwarven Runesmiths, powerful dwarven magic)
Bladesinger (Shalonesti)
(Elves who have learned the art of bladesinging)
Eldritch  (Shalonesti)
(Physically Weak, but strong elvish magic)
Shadow Knight (Shadow)
(Honorable Evil Knights of Necrucifer)
Paladin (Knighthood)
(Great Knights of the Gods of Good)
Anti-Paladin (ex-Knighthood)
(ex-Paladins gone bad)
Necromancer (Conclave)
(Magic users who use magic from the undead)
Invoker (Conclave)
(shapes magical energy to create an effect or object)
Transmuter (Conclave)
(Mages that change physical properties of an object or creature)
Battle Mage (Conclave)
(Plenty of Hit Points and physical defense based magic, poor offensive magic)
Monk (Manatonics)
(Manatonics who dedicate their life to their art)
Dragon Slayer (Slayers)
(Warrior like fighter with a specialized skills for slaying Dragons)