If you're still accepting, I'd love to be in.
I'm thinking going pure spellcaster using this PrC if it's okay (I've copied it out below) maxed out to lvl 30 (so we're talking abjurer5/banisher30/archmage5). Maybe I'd also go for a LA race, but I think caster level is necessary for beating demigod SR, and with this character I could have a (let's see here) around +52 to beat SR. If this PrC isn't okay with you, I'll work something out, still being the dedicated spellcaster.
What kind of point buy are you talking here, any rules variants?
Banisher
The banisher is a mage who specializes in forcing those not of this plane away.
Requirements:
Skills: Knowledge:The Planes 8 ranks, Spellcraft 8 ranks
Feats: Spell Focus: Abjuration, Spell Penetration: Abjuration
Special: Must be able to prepare 3rd level arcane spells at least one of which must be from the school of abjuration. Must know no conjuration spells.
HD: d4
Skills: Concentration (Con), Craft (Int), Knowledge: All (Int), Spellcraft
Code:
[b] BAB Fort Ref Will Abilities[/b]
1. +0 +0 +0 +2 Turn Outsider +1 spellcaster level
2. +1 +0 +0 +3 Abjurant Focus +1 +1 spellcaster level
3. +1 +1 +1 +3 Abjurant Penetration +1 +1 spellcaster level
4. +2 +1 +1 +4 Extra Abjuration +1 spellcaster level
5. +2 +1 +1 +4 Abjurant Focus +2 +1 spellcaster level
6. +3 +2 +2 +5 Abjurant Penetration +2 +1 spellcaster level
7. +3 +2 +2 +5 Versatile Banishment +1 spellcaster level
8. +4 +2 +2 +6 Abjurant Focus +3 +1 spellcaster level
9. +4 +3 +3 +6 Abjurant Penetration +3 +1 spellcaster level
10.+5 +3 +3 +7 Word of Ending +1 spellcaster level
Abilities:
Turn Outsider: The banisher may turn outsiders at his caster level, using int instead of char. If the banisher double the HD of the outsider in question, it is banished instead of rebuked.
Abujurant Focus: At second level the DC of all abjuration school spells cast by the banisher increases by +1. At fifth level this rises to +2, and at eight to +3.
Abjurant Penetration: The Banisher gets this bonus to caster level checks to beat SR using abjuration school spells.
Extra Abjuration: The Banisher gets an extra slot of each spell level he can cast which must be used to prepare a spell from the abjuration school.
Versatile Banishing: The banisher may affect creatures other than outsiders with abjuration spells that only target outsiders, and may banish creatures to planes not their native planes (the native plane of a non-outsider is determined by their alignment). A non-outsider gets +4 on saves to resist these spells, and creatures get +4 to resist spells that banish them to planes not their own. These stack.
World of Ending: With a single word (counts as a quickened spell) the banisher may Banish up to 3 HD of creatures per caster level (as per the spell Banish) and target all magical effects in a hundred foot radius with a dispel magic (no maximum bonus). The Banisher may use this ability once per day. For saves, this counts as a 10th level spell of the abjuration school.
Epic Banishers: Every 5 levels after eighth the abjurant focus goes up by +1, and ever 5 levels after 9th the penetration goes up by one. At 20th level, all save bonuses from versatile banishing are halved, and at 30th level word of banishing counts as a 15th level spell and banishes 4 HD per caster level.