The ClassThe TrickComparison, Being Undead[spoiler]
Sorcerer, Charisma score 18, save DC 14 + spell level, bonus spells / day 1,1,1,1
Tainted Scholar, Charisma score 18, save DC 15 + spell level, bonus spells / day 2,1,1,1,1
Sorcerer, Charisma score 24, save DC 17 + spell level, bonus spells / day 2,2,2,1,1,1,1
Tainted Scholar, Charisma score 24, save DC 16 + spell level, bonus spells / day 2,2,1,1,1,1
Sorcerer, Charisma score 30, save DC 20 + spell level, bonus spells / day 3,3,2,2,2,2,1,1,1,1
Tainted Scholar, Charisma score 30, save DC 17 + spell level, bonus spells / day 2,2,2,1,1,1,1
It gets worse from there. You get the idea.
Being undead, the turning point is at a score of 24, and for outsiders it is at 25.
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Comparison, Not Undead[spoiler]
Point the FirstPoint the SecondOther Points on StatsEvaluation: Pros and Cons[spoiler]
Pros[spoiler]
1) Tainted Scholar gets the most spells per day. Any trick that can be used on the other stats, can be used to increase Wisdom too, and since the Depravity score you go insane at is [(Wisdom/4, round up) * 14] and the Tainted Scholar gains bonus spells based on Depravity +10. He gets the most out of each stat point: other classes get 1-1; he gets 1-3.5 out of each stat increase.
2) Feats, the Scholar gets them. All of those high-stats above have evil stuff, so any can devote themselves to an Elder Evil to get bonus feats, and all will likely accrue Taint, gaining those feats. But with the Scholar, it is not an assumption that he MIGHT, like the others, or that he CAN, he WILL get those feats. And feats are good.
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ConsHow you make your wizard like a spontaneous caster[spoiler]
So that is my synopsis. Tainted Scholar gets a lot of spells. War Weaver gets to buff the party quickly, breaking action economy. Effigy Master gets mini-mecha, which can get more broken than Gurren Lagann. Shadowcraft Mage, can do whatever he wants. Et cetera.
Incantatars, Planer Shepards, Illithid Savants, Beholder Mages, Dweomerkeepers, and Artificers get to own the world.
Tainted Scholar gets spells per day. Whoopee. Feats that others can get too, yay. And has to deal with the penalties of Taint in the process.
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But, Wait! Hope for being broken Yet!As you mentioned, the Ritual of Alignment from Savage Species can explicitly add the evil subtype. So that's fairly easy. (For some reason I thought that the Fiendish template gave you the evil sub-type as well, but blargh, it just gives you the Extraplanar subtype. That seems silly.)
2)
Divine Minion[/spoiler]
End of Rant, feel free to post now.