Expand Bard to 9 casting levels
Edit: The ones in red are my suggestions to finish the transition. I think the healing line makes them too OP still so have omitted for now.
Level 7
Banishment Caster Level(s): Cleric 6, Wizard / Sorcerer 7
Ethereal Jaunt Caster Level(s): Cleric 7, Wizard / Sorcerer 7
Hiss of Sleep Caster Level(s): Wizard / Sorcerer 7
Mordenkainen's Sword Caster Level(s): Wizard / Sorcerer 7
Summon Creature VII Caster Level(s): Cleric 7, Druid 7, Wizard / Sorcerer 7
True Seeing Caster Level(s): Cleric 5, Druid 7, Wizard / Sorcerer 6, Knowledge 4, Animal 4
Regenerate Caster Level(s): Cleric 7, Druid 6, Ranger 3
Power Word Blind Caster Level(s): Wizard / Sorcerer 7
Feeblemind Caster Level(s): Wizard / Sorcerer 5
Mass Invisibility Caster Level(s): Wizard / Sorcerer 7
Resurrection Caster Level(s): Cleric 7
Level 8
Prismatic Spray Caster Level(s): Wizard / Sorcerer 7
Solipsism Caster Level(s): Wizard/Sorcerer 7
Iron Body Caster Level(s): Wizard / Sorcerer 8
Mass Charm Monster Caster Level(s): Wizard / Sorcerer 8
Mind Blank Caster Level(s): Wizard / Sorcerer 8
Summon Creature VIII Caster Level(s): Cleric 8, Druid 8, Wizard / Sorcerer 8
Mass Blindness/Deafness Caster Level(s): Wizard / Sorcerer 8
Power Word Stun Caster Level(s): Wizard / Sorcerer 8
Greater Shadow Evocation Caster Level(s): Wizard / Sorcerer 7
Shadow Shield Caster Level(s): Wizard / Sorcerer 7
Level 9
Dominate Monster Caster Level(s): Wizard / Sorcerer 9
Etherealness Caster Level(s): Cleric 9, Wizard / Sorcerer 9
Mass Hold Monster Caster Level(s): Wizard / Sorcerer 9
Mordenkainen's Disjunction Caster Level(s): Wizard / Sorcerer 9
Shadow Simulacrum Caster Level(s): Wizard/Sorcerer 9
Summon Creature IX Caster Level(s): Cleric 9, Druid 9, Wizard / Sorcerer 9
Weird Caster Level(s): Wizard / Sorcerer 9, Evil 9
Power Word Kill Caster Level(s): Wizard / Sorcerer 9, Death 9
Shades Caster Level(s): Wizard / Sorcerer 9