Hmm.  As another potential alternative, Zaer, how do you feel about the 'Arcane Swordsage' suggested in the Adaptation section of the Swordsage information in the Tome of Battle?  I know it's commonly thought of as a poorly thought-out and potentially-overpowered variant, depending on which spells the character chooses to learn, but I'm sure Chloe could be trusted not to abuse the various options it would open up for her.