If you're looking for a way to store spells for later use, try Inscribe Magical Tattoo? And if you can still change your character a bit, Metamagic Rager might let you add metamagic feats to the stored spells without changing their caster level (depending on the DM). There is also VMC with Magus to give you another 18 levels of spell storage with the Spell-Scars arcana.
