Two days without disintegrate and having acid fog. Just reporting some findings.
Acid fog is very useful but disintegrate was even more. Already faced many monsters without any working means to kill them without it. I even just had a dream where I was missing disintegrate also. 
I did enchantment reset also to support acid fog and damage output is still slow, of course there's nice slow effect and 20% miss chance but in most of the situations I was in, spell points would have been better served on more firewalls. Now that I dropped out Imp emp II, Imp max III and imp heighten II for action points I'm also out of spell points all the time. And chain lightning with (now) higher damage output still isn't worth spell points. So I thought solid fog instead of acid, ball of lightning somewhere(without enchantments for it) and dropping chain lightning. Detect Secret to True seeing. Fireball to Rage. Too many chances. There's also finger of death now(but no prismatic spells at all).
What IF I reroll directly to this spell selection(should include most of the suggested ones excluding Acid Fog which I just don't like as much as disintegrate)?
Code:
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Level 17 Chaotic Neutral Drow Female
(17 Sorcerer)
Hit Points: 105
Spell Points: 1648
BAB: 8\8\13
Fortitude: 6
Reflex: 6
Will: 9
Starting Feat/Enhancement
Abilities Base Stats Modified Stats
(28 Point) (Level 1) (Level 17)
Strength 8 8
Dexterity 12 12
Constitution 13 13
Intelligence 12 12
Wisdom 8 8
Charisma 20 26
Starting Feat/Enhancement
Base Skills Modified Skills
Skills (Level 1) (Level 17)
Balance 1 1
Bluff 5 8
Concentration 5 22
Diplomacy 7 14
Disable Device n/a n/a
Haggle 5 8
Heal -1 -1
Hide 1 1
Intimidate 5 8
Jump -1 -1
Listen -1 1
Move Silently 1 1
Open Lock n/a n/a
Perform n/a n/a
Repair 1 1
Search 1 3
Spot -1 1
Swim -1 -1
Tumble n/a 5
Use Magic Device 7 18
Level 1 (Sorcerer)
Skill: Concentration (+4)
Skill: Diplomacy (+2)
Skill: Use Magic Device (+2)
Feat: (Selected) Spell Focus: Evocation
Spell (1): Jump
Spell (1): Nightshield
Level 2 (Sorcerer)
Skill: Concentration (+1)
Skill: Tumble (+0.5)
Skill: Use Magic Device (+0.5)
Spell (1): Master's Touch
Level 3 (Sorcerer)
Skill: Concentration (+1)
Skill: Tumble (+0.5)
Skill: Use Magic Device (+0.5)
Feat: (Selected) Empower Spell
Spell (1): Magic Missle
Level 4 (Sorcerer)
Skill: Concentration (+1)
Skill: Tumble (+0.5)
Skill: Use Magic Device (+0.5)
Spell (2): Blur
Level 5 (Sorcerer)
Skill: Concentration (+1)
Skill: Tumble (+0.5)
Skill: Use Magic Device (+0.5)
Spell (2): Knock
Level 6 (Sorcerer)
Skill: Concentration (+1)
Skill: Tumble (+0.5)
Skill: Use Magic Device (+0.5)
Feat: (Selected) Greater Spell Focus: Evocation
Spell (3): Displacement
Level 7 (Sorcerer)
Skill: Concentration (+1)
Skill: Tumble (+0.5)
Skill: Use Magic Device (+0.5)
Spell (2): Web
Spell (3): Rage
Level 8 (Sorcerer)
Skill: Concentration (+1)
Skill: Tumble (+0.5)
Skill: Use Magic Device (+0.5)
Spell (4): Wall of Fire
Level 9 (Sorcerer)
Skill: Concentration (+1)
Skill: Tumble (+0.5)
Skill: Use Magic Device (+0.5)
Feat: (Selected) Extend Spell
Spell (2): Scorching Ray
Spell (3): Haste
Spell (4): Stoneskin
Level 10 (Sorcerer)
Skill: Concentration (+1)
Skill: Diplomacy (+0.5)
Skill: Use Magic Device (+0.5)
Spell (5): Cone of Cold
Level 11 (Sorcerer)
Skill: Concentration (+1)
Skill: Diplomacy (+0.5)
Skill: Use Magic Device (+0.5)
Spell (3): Frost Lance
Spell (4): Fire Shield
Spell (5): Teleport
Level 12 (Sorcerer)
Skill: Concentration (+1)
Skill: Diplomacy (+0.5)
Skill: Use Magic Device (+0.5)
Feat: (Selected) Heighten Spell
Spell (6): Disintegrate
Level 13 (Sorcerer)
Skill: Concentration (+1)
Skill: Diplomacy (+0.5)
Skill: Use Magic Device (+0.5)
Spell (4): Solid Fog
Spell (5): Ball Lightning
Spell (6): Greater Heroism
Level 14 (Sorcerer)
Skill: Concentration (+1)
Skill: Diplomacy (+0.5)
Skill: Use Magic Device (+0.5)
Spell (7): Delayed Blast Fireball
Level 15 (Sorcerer)
Skill: Concentration (+1)
Skill: Diplomacy (+0.5)
Skill: Use Magic Device (+0.5)
Feat: (Selected) Maximize Spell
Spell (5): Protection From Elements
Spell (6): True Seeing
Spell (7): Finger of Death
Level 16 (Sorcerer)
Skill: Concentration (+1)
Skill: Diplomacy (+0.5)
Skill: Use Magic Device (+0.5)
Spell (8): Otto's Irresistable Dance
Level 17 (Sorcerer)
Skill: Concentration (+1)
Skill: Diplomacy (+0.5)
Skill: Use Magic Device (+0.5)
Spell (7): Banishment
Spell (8): Polar Ray
Enhancement: Sorcerer Improved Empowering I
Enhancement: Sorcerer Improved Empowering II
Enhancement: Sorcerer Improved Heightening I
Enhancement: Sorcerer Improved Heightening II
Enhancement: Sorcerer Improved Maximizing I
Enhancement: Sorcerer Improved Maximizing II
Enhancement: Sorcerer Improved Maximizing III
Enhancement: Sorcerer Concentration I
Enhancement: Sorcerer Lineage of Elements I
Enhancement: Sorcerer Lineage of Elements II
Enhancement: Sorcerer Lineage of Elements III
Enhancement: Sorcerer Lineage of Deadly Elements I
Enhancement: Sorcerer Lineage of Deadly Elements II
Enhancement: Sorcerer Lineage of Deadly Elements III
Enhancement: Sorcerer Elemental Manipulation I
Enhancement: Sorcerer Elemental Manipulation II
Enhancement: Sorcerer Elemental Manipulation III
Enhancement: Sorcerer Elemental Manipulation IV
Enhancement: Sorcerer Spell Penetration I
Enhancement: Sorcerer Energy of the Dragonblooded I
Enhancement: Sorcerer Energy of the Dragonblooded II
Enhancement: Sorcerer Subtle Spellcasting I
Enhancement: Sorcerer Subtle Spellcasting II
Enhancement: Sorcerer Charisma I
Enhancement: Sorcerer Charisma II
Enhancement: Sorcerer Wand Mastery I
Enhancement: Sorcerer Wand Mastery II
EDIT: Ok, going with that. Thanks for all the advices.