Solo's Stupendously Superior Sorcerer
Recommended changes to the Sorcerer class. (Also, Shneeky helped)
4 skill points/level
K. Dungeoneering, Planes, and Religion, and UMD added as class skills.
Free Eschew Materials (level 1)
Cha to saves vs spells and SLA (level 3)
Free metamagic feat (level 5)
Spontaneous Magic (level 8)
Cha to AC as a deflection bonus, Free metamagic feat (level 10)
Cantrips at will (level 12)
First level spells at will, Free metamagic feat (level 15)
Second level spells at will (level 18)
Sorcerous Spell Resistance, Free metamagic feat (level 20)
Spontaneous Magic
The sorcerer gains the ability to cast Prestidigitation, spell X, and expend a spell slot of level Y so as to modify spell X so that it functions like a sorcerer spell of Y level that shares the same school and subschool as spell X.
A Silent Image modified with this ability would be able to mimic a Major Image, at a cost of a 0th, 1st, and 3rd level spell slot.
This ability can be used 1+Int mod times per day. The mimicked spell will have a 1 round casting time at minimum, and a duration of either 1 round/level or instantaneous, whichever would make more sense. No metamagic may be applied to this spell.
Sorcerous Spell Resistance
The sorcerer gains spell resistance equal to 10 + hit dice, and can raise or lower it as a free action.
Explanations:
Skill points: Sorcerers couldn't even have enough skill points to cover their bases before without being human and having at least a 12 in Int.
Skills: Sorcerers are the ones who are going out to adventure. They might not know about history and the like, but they should be familiar with useful knowledge to identify the monsters they may encounter. UMD is there for obvious reasons.
Eschew Materials: Obvious.
Cha to saves vs spells and SLA: Force of Personality, baby!
Free Metamagic feat: Sorcerers are all about metamagic.
Spontaneous Magic: Sorcerers do it spontaneously.
Cha to AC as a deflection bonus: Putting Charisma to use.
Spells at will: I'm sure it's exploitable, somehow, but it seems like so much fun. Besides, at the level you get these abilities you can buy enough wands that you effectively have lower level spells at will anyways.
Sorcerous Spell Resistance: You have SR. And it doesn't interfere with buffing.