You could have REALLY told me that BEFORE I went with Arcane Disciple and SCM, osle...
EDIT: I know it's your prerogative and all as a DM to ban what you need to, or feel the need to, but I could've used that information BEFORE I built my character. Admittedly, if I had told you of my plans earlier, I would have probably gotten a heads-up, but I didn't expect it to be an issue.
EDIT2: If I may offer a suggestion...
I don't particularly mind paying XP for Shadow Miracles. It should be kind of the illusionist nova, as it were.
But might I suggest we waive the GP cost for the spell? We could also put up a limit such as "you cannot have a total of spell levels inside Delicate Disks any higher than your CL x half your level, rounded down".