Dread Necro/Anima Mage/Tenebrous Apostate build

[Grod_The_Giant]

A friend of mine is looking to run a 20th level, dragon-hunting one-shot next week, using my giant set of houserules and homebrew (http://www.giantitp.com/forums/showthread.php?329161-Giants-and-Graveyards-Grod-s-collected-3-5-revisions). I'm thinking about playing a Dread Necro/Binder theurge of some description, and so I come to you for tips and tricks.


General

Skill points go a lot farther than normal.
Cross-class skills are dead easy.
Free skill tricks
Casting Defensively is harder (DC is is 15+BAB of the toughest thing threatening you)
Metamagic does not increase casting time.
Most really broken spells/PrCs are banned.



Binder

Progression caps at 5 vestiges at a time.
Zceryll doesn't grant summon monster SLAs.


Dread Necromancer (http://www.giantitp.com/forums/showthread.php?348151-Revised-Dread-Necromancer-%28Fixed-List-Caster-Project%29)

Spell progression isn't delayed
All summoning and most undead minionmancy is done through a class feature, not spells.
Rebuke Undead still lets you dominate HD=effective turning level undead.
Tomb-Tainted Soul is a bonus feat at 2nd.
Eclectic Learning (as the Warmage ACF, but with necromancy instead of evocation) at 4th level, and every subsequent even-numbered level.



I've gotten approval to adapt Tenebros Apostate to advance arcane casting. Right now, my build is looking something like:

Human Binder 1/Dread Necromancer 3/Anima Mage 10/Tenebrous Apostate 5/Dread Necromancer +1. (By my calculations, the build will get 9th level spells and 8th level vestiges, with an effective CL of 20 thanks to Practiced Caster)

Feats:
Human-Improved Binding
1- Extend Spell
2B- Tomb-Tainted Soul
3-Practiced Caster
6-Ignore Special Requirements
9- Persistent Spell

Beyond that, though, I'm not sure where to go, never having played a binder or a caster at that high a level. I'm pretty sure I'm not going a gish route-- those ten levels of Anima Mage will see to that. I've been looking at a couple of Divine/Devotion feats to make use of the effectively unlimited turn attempts from Tenebrous (Healing Devotion? Divine Vigor looks pretty nice; Divine Fortitude and Defiance too).

Anyway what does the playground suggest for a build like this? All books/setting material, provided they fit within the linked houserules; mid-to-high op-- some of the players are pretty experienced, and the revised base classes we're using are balanced against things like the Warblade and, well, Dread Necromancer.

(So far, the party's got a Ranger (http://www.giantitp.com/forums/showthread.php?260804-Ranger-Scout-recombination-%283-5-PEACH%29&p=14192508#post14192508), and a Paladin/Grey Guard (http://www.giantitp.com/forums/showthread.php?221312-A-hero-is-a-man-too-stubborn-to-die-a-3-5-Paladin-fix-%28PEACH%29&p=12150015#post12150015))

[Grod_The_Giant]

OK, after some poking, I'm looking at Healing Devotion and Spell Focus/GSF (Necromancy) for my last few feats. I'm really blanking on that 20th level Advanced Learning, though. (Mind Blank? Ghostform?)

[Biffoniacus_Furiou]

Use Illumian from RoD with the Naenhoon runeword for your race. This will allow you to spend turn/rebuke uses to add metamagic to two spells/day similar to Divine Metamagic, but with arcane spells.

Take the Magical Training regional feat from PGtF at 1st level to get a spellbook, Illumians are Humanoid (Human) and thus qualify. Per the Rules Compendium you can add more spells to this spellbook just as a Wizard does, and you're considered to know those spells. Take the feat Versatile Spellcaster in RotD and you can spend two Dread Necro spell slots of the same level to cast any spell you know of one level higher, including those Wizard spells you've copied into that spellbook. Get two flaws (http://www.d20srd.org/srd/variant/buildingCharacters/characterFlaws.htm) (more here (http://www.giantitp.com/forums/showthread.php?258440-The-quot-Best-quot-Flaws#30)) for two extra feats at 1st level if necessary.

[Grod_The_Giant]

That's... a bit too intense, I think. Good trick, though.

[Biffoniacus_Furiou]

That's... a bit too intense, I think. Good trick, though.

Just Illumian with Naenhoon to have two spells active all day, such as Aura of Terror and Friendly Fire, shouldn't be too much trouble. Friendly Fire will redirect any ranged attacks targeting you to another nearby creature, which would easily be your undead minions. Using your undead as meat shields is definitely fitting, and Aura of Terror is really good if it lasts all day, but really mediocre for its level otherwise.