Note: Uncanny Forthought lets you reserve a number of spell slots for a masted spell, you are looking at Silent Image. It's a trap, drop it.
Reserve slots by
preparing Heightened Silent Image instead. It frees up two feat slots.
So with that in mind.
1: Abyssal Focused Specialist Wizard 1, Spell Focus: Illusion, Earth Sense
F, Heighten Spell
F, Spell Mastery(silent image)
H, Improved Initiative
B.
2: Abyssal Focused Specialist Wizard 2
3: Abyssal Focused Specialist Wizard 3, Earth Spell.
4: Abyssal Focused Specialist Wizard 4
5: Abyssal Focused Specialist Wizard 5, Spontaneous Divination
Sub.
6: Abyssal Focused Specialist Wizard 6, Versatile Spellcaster.
7: Abyssal Focused Specialist Wizard 7
8: Abyssal Focused Specialist Wizard 8
9: Abyssal Focused Specialist Wizard 9, Uncanny Forethought.
10: Abyssal Focused Specialist Wizard 10, Planar Spell Casting(chaos)
Sub.
11: Shadowcraft Mage 1
12: Shadowcraft Mage 2, Chaotic Spell Recall, Retrain Spell Mastery & Uncanny Forethought for Primordial Scion & Cloak Of The Obyrith.
13: Shadowcraft Mage 3
14: Shadowcraft Mage 4
15: Shadowcraft Mage 5, Iron Will.
16: Incantatrix 1, Extend Spell.
17: Incantatrix 2
18: Incantatrix 3, Precognitive Visions.
19: Incantatrix 4, Persist Spell.
20: Incantatrix 5
Abyssal Focus: [Chaotic], [Compulsion], [Darkness], [Evil], and [Fear] is your "specialist school".
Focused Specialist: Lose 1 spell slot, gain two of specialist school.
Planar Spell Casting(chaos): Every spell you have is [Chaotic], and gains +1 to save DCs.
Abyssal Heritor
-Cloak Of The Obyrith: DR (heritor+1=5)/Law.
-Precognitive Visions: (heritor/2=2) selections from a list. Gain +1 insight to choices.
-Primordial Scion: +((heritor/4)+1=2)d6 damage on all attacks to lawful creatures.
-Chaotic Spell Recall: (heritor/2=2) times per day you can recall any [Chaotic] spell.
Basically, you trade MotAO's 3/day anyspell and your next to worthless Uncanny Forethought for two additional spells slots for each level and an extra two up-to-9th-level spells recalled on the fly (doesn't have to be silent image). Extra Spell Slots which in turn will power Versatilel Spellcaster (see below). Further you are not prohibited from casting any spell, because any spell you cast is [Chaotic] and thus part of your focused school. Depending on how liberal you take
Her spells gain the indicated alignment descriptor., you could even go as far as ignoring the concept of prohibited spells.
Finally, even if this build doesn't appeal to you, one of the feats listed may be really useful to you. If you (and your DM) feels Spontaneous Divination counts as being able to Spontaneously Cast Spells. Versatile Spellcaster let's you cast any spell you know, example fuse two 5th slots together to cast any 6th level spell in your spellbook on the fly.
Edit: The MiC (or some Ebberon book) has a cross bow that channels ray spells though it. Scion used in conjunction with it can augment damage with nondamaging spells. Much like a Snowcast/Flash Frost combo, but only with rays (and touch spells I think) against lawful targets. Chaos Shuffling would let you drop Improved Initiative for Fell Drain too.