The Path to a Higher DC
If you use Relics and Rituals, why not use Creature Compendium 2?
"Bloodless" (Template from CC2) Human Sor 6/Shadow Adept 9/Archmage 3
Charisma: Start at 18, +4 mod, +6 item, +5 wish, +5 tome (forgot if wishes and tomes stacked or not

)=38 Charisma
Feats: Shadow Weave Magic, Spell Prodigy, Spell Focus (Illusion, Necromancy, or Enchantment), Greater Spell Focus (Illusion, Necromancy, or Enchantment), 1 Metamagic Feat, Skill Focus: Spellcraft, Spell Focus in one other school.+All other Shadow Weave feats
Archmage Powers: Spell Power +1-3
Bloodless template allows you to drain charisma from people, 1d3 points a round (permanent), gaining 1 temporary charisma point, doing this on the average commoner this will require about 8 commoners + 1 more every day to mantain a charisma of 76.
DC with Chosen School from Illusion, Enchantment, or Necromancy: 10+33 (Charisma)+6 (Archmage Spell Power)+3 (Shadow Adept Spell Power)+4 (Greater Spell Focus)+1 (Spellcasting Prodigy)+1 (Shadow Weave Magic)+Spell level
Making the DC for a 9th level spell 67, excluding any other spell enhancers and the like, although of course the charisma is temporary, it lasts a long time (you lose 1 point a day, but you can drain it back up) and you're probably a very evil character
Edit-With Spell Enhancer and the two doses of that drug, the 9th level spell above would be DC 72
Also, Adding Old Age Bonuses you could get a base of 41 charisma, which, when doubled would be 82 instead making the DC for a 9th level spell w/o extras 70, with 75
Further Edit-Okies, forgot if the inherent bonuses stacked which I even stated myself, so thats 72 charisma, 80 with that plate of command, making the DCs 69 and 74, respectively

Might I note that most of the wizards who use Red Wizard PrCs as well as the Shadow Adept PrC are usually evil as well
