[3.5 Magic System] The Codices of Spellshaping

[DonQuixote]

You can certainly try, but I'll point out this clause from "Advancing Spellshaping Progression" in Codex I:

However, at any level at which you gain both a new formula known and an additional formula prepared, you must apply both advancements to the same spellshaper class.

And this one from the Extra Prepared Formula feat:

However, you cannot take this feat if doing so would cause the number of formulae that you can prepare to exceed the number of formulae that you know.

If I recall how the idiot crusader works, that sort of slaps the idiot impulse mage in the face.