Not a good build to be honest, the spell selection isn't that good, the feat selection isn't that good, the stat distribution isn't that good, stalwart sorcerer isn't needed here, and elf isn't a good racial choice even with the otherworldly feat.
Silverbrow Human paladin2/sorcerer4/spellsword1/abjurantchampion5/sacredexorcist8
Str 14
Dex 10
Con 13
Int 12
Wis 8
Cha 15
Feats:
1-power attack, dreadful wrath (maybe retrain later to heighten spell once you start constantly running into fear-immune foes)
3-knowledge devotion (the planes for your knowledge skill)
6-combat casting
9-arcane strike
12-practiced spellcaster
15-divine might
18-minor shapeshift
Now you're a much more fearsome combatant much earlier
Spell list
1-silent image, grease, shield, nerveskitter, beign tranpositation
2-wraithstrike, wings of cover, resist energy, glitterdust, ray of stupidity
3-magic circle against evil, haste, greater magic weapon, stinking cloud
4-wings of flurry, charm monster, greater mirror image, ray of exhaustion
5-dismissal, draconic polymorph, telekenesis, overland flight
6-greater dispel magic, disintegrate, acid fog?
7-limited wish, greater teleport, greater shadow conjuration
8-greater shadow evocation, greater arcane fusion
9-time stop