I'd probably go with Focused Illusionist 3/Master Specialist 4/Shadowcraft Mage 3/Illusionist +2/Shadowcraft Mage +2/Shadow Adept 1/Shadowcrafter +X. This way you get that boost to save DCs early on, and you get the crazy spontaneous divination when the game's strategy fully shifts to scry & die.
Spontaneous casting of any divination spell in the game ever ever? Sign me up. As far as versatility is concerned, you'd be hard pressed to do better than Shadowcraft Mage + Spontaneous Divination.