First, a version without SCM :
Wizard 5/Incantatrix 10/Contemplative 3/Mindbender 1/Prestige Paladin 1 Not in that order. What this nets, with the Midnight Metamagic trick above, is 5 free levels of metamagic, a free metamagic feat per spell since you're also considered a Cleric of Mystra, access to Initiate of Mystra, a reduction of 1 per metamagic feat from Improved Metamagic, and after you throw on the standard (+10 or so) CL boosters on top of Mystic Fire Knight, you can easily create a class 10 or greater Node. Total : 10-11 free levels of metamagic, 1 free metamagic feat, -1 level cost per feat, triple digit CL, and toggle switch Arcane Spellsurge thanks to Battle Blessing. Go full monty with Spell Swap and Uncanny Foresight to be able to quick cast anything.
SCM would sub out Prestige Paladin and Contemplative, and possibly Mindbender. Or leave in Contemplative at the expense of a Wizard level or two, using early entry, to keep IoM, and then take Arcane Thesis (Silent Image). Now all that reduction and bonus metamagic can be focused on one spot, namely Shadow Greater Effect Miracle.