Foresight 11
Gate 19
Imprisonment 17
Invulnerability 8
Mass Heal 21
Mass Polymorph 16
Meteor Swarm 24
Prismatic Wall 20
Psychic Scream 17
Shapechange 19 - pun pun the allmighty easybake kobold uber god (over deity is an understatement) must never rise again. His cheese is too powerful and this spell makes me uneasy.
Time Stop 1
True Polymorph 17 - turn into something that can create portals and hold them open or do some other persistable planar/spatial manipulation especially if its at will. Make sure the new form has "the ability to cast spells" to technically retain all your spellcasting ability by RAW. Throw an antimagic field around it that through any means necessary is shaped like a thin bubble 5 feet away in all directions and is permanent. While bit exactoy being invincible or broken (just really good) congratulations, you are now a really cool "MAGITANK". May your enemies prostrate themselves before you. You can cast spells upon those who resist and they cant cast spells through your field like you can unless they also have a portal type of ability. And chances are you chose something decently physically intimidating too. If not you can always cast true polymorph and temporarily take on a physically imposing form before reverting back to your other polymorphed form.
True Resurrection 4