expand_less Tier 0: Nothing (no published class is this powerful, but they can be with certain options like the Incantatrix or infinite power point Spell-to-Power Erudite abuse).
Tier 0.5:  Erudite  (Spell to Power variant)
Tier 1: Archivist, Artificer, Cleric, Druid, Erudite (Spell to Power variant)?, Wizard
Tier 1.5: Cleric (Spontaneous), Death Master, Master,Erudite, Psion, Sha'ir,Druid (Spontaneous, Urban), Erudite, Evangelist, Shaman, Sha'ir, Spirit Shaman, Psion, Wu Jen
Tier 2: Binder (w/ Zceryll vestige), Favored Soul, Sorcerer, Truenamer (w/ inifinte summoning)
Tier 2.5: Mystic,Beguiler,  Shugenja
Tier 3: Beguiler, Dread Necromancer,Necromancer, Factotum Crusader,(w/ Bard,Font Swordsage,of BinderInspiration), (onlyMystic, basicShugenja, 
Tier vestiges),3: Bard, Binder, WildshapeCrusader, Ranger,Jester, Duskblade,Swordsage, Warblade, Warlock, Warmage, Psychic Factotum, Warblade, Psychic Warrior, Incarnate, Totemist, Wilder, Ardent,Ardent,  Shugenja, 
Tier 3.5: 
Tier 4:Dread Rogue, PFNecromancer, Ninja,Dragonfire Barbarian,Adept, Duskblade, Factotum, Healer, Warlock,Ranger Warmage,(Wild Scout,Shape), 
Tier Ranger, 4: Hexblade, Adept, Spelltheif,Barbarian, Paladin, Ranger, Rogue, Scout, Shadowcaster, Spelltheif, 
Tier Marshal,4.5: WarlordDivine (byMind, Adamant),Fighter, Hexblade, ArchetypedMarshal,  Fighter, Paladin, Adept, Bloodrager, Slayer, Archetyped Brawler, Archetyped Monk, PistoleroNinja, / MusketSavant, Sohei, Truenamer Master Gunslinger, Aegis, Marksman, Archtyped Soulknife, Dragonfire Adept, Jester, Montebank, Savant, Shadowcaster, Sohei, Daevic, Medium, Vigilante, Kineticist
Tier 4.5: 
Tier 5: Fighter,Battle Monk,Dancer, Dragon CAShaman, /Mountebank, Samurai (OA, Rokugan Ninja, Healer, Swashbuckler (both versions), Soulknife, Expert, OA / CW Samurai w/(w/ Imperious Command), Knight,Soulknife, Soulborn, Gunslinger,Swashbuckler, Battledancer,Knight, DivineSoulborn, Mind, Dragon Shaman, 3.5 Eidolon, Lurk, Noble, Master, Magewright, Mariner,Mariner Mlar, Cavalier
Tier 5.5: Samurai (CW), Expert, 
Tier 6: CWAristocraft,  Samurai, Aristocraft, Warrior, Commoner, TruenamerWarrior,  (w/o infinite summoning), Dread (w/ fear immune enemies)