Stoneskin:

You know what... you tell me why a Sorcerer should not have Stoneskin.

Greater Malison:

Lowering a group of targets' saving throws by 4, this spell helps to maximise the potential of your spells.

Emotion:

Nothing like all your enemies lying motionless on the ground for you to torment at your leisure. Combined with Greater Malison, you can still use this spell effectively in ToB.

Minor Spell Sequencer:

Others think this is not a good spell, to me it means an extra two spells to unleash.

Wizard Eye:

For guiding your summons if you do not want to risk any of your characters.

Spider Spawn:

Since you will have no Web, Spider Spawn will be too weak as a summon.

Ice Storm:

Pitiful damage.

Polymorph Other:

This is actually a good spell, but higher level enemies tend to have outrageous saving throws against Polymorph. Great in SoA, but tends to be ignored in ToB.

Polymorph Self:

If I wanted to change into a Mustard Jelly, I will get somebody else to do it, or use the Cloak of Sewers.