I realize that everyone is sick and tired of Mystic Theurge threads.
That said, I haven't actually found a guide for the Prestige Class and figured I'd give a shot at writing one. I want to check to make sure I don't have anything wrong.
Here's what I found as ways to "cheat" entry into the class based on the FAQ. Let me know if/where I misunderstand things, or if I'm missing anything you can think of
Cleric with Trickery Domain. At first level, the copycat ability functions as Mirror Image. This qualifies for the arcane half.
Oracle with Wood Mystery. At first level, the oracle can take the Bend the Grain revelation. This qualifies for the divine half.
Aasimar, Incorruptible Racial Trait. This gives Corruption Resistance as a SLA. This qualifies for the divine half.
Drow. Drow get Darkness as an SLA. This qualifies for the arcane half.
Tengu, Long-Nose Form. 3rd level Tengus can take a feat which gives Alter Self as an SLA. This qualifies for the arcane half.
Tiefling. Tieflings get Darkness as an SLA. This qualifies for the arcane half.
Duergar. Duergar get invisibility as an SLA. This qualifies for the arcane half.
Kitsune. Kitsune get Alter Self as an SLA. This qualifies for the arcane half.
Svirfneblin. Svirneblins get Blur and Blindness/Deafness as SLAs. This qualifies for the arcane half.
Half Elves, Drow Magic. At the cost of Adaptability and Multitalented, Half-Elves get Darkness as an SLA. This qualifies for the arcane half.
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Okay, so if I'm understanding everything, I see two main 3rd level Mystic Theurges:
Drow/Tiefling/Duergar/Kitsune/Svirfneblin/Half-Elf (with an SLA for the arcane half) with an arcane class (doesn't matter) and Oracle (Wood Mystery - with the first revelation being Bend the Grain)
Aasimar (Incorruptible) Cleric (Trickery) and an Arcane class (doesn't matter)
... am I understanding everything correctly?
Agh, sorry, forgot about the Knowledge prereqs.
Okay, they would be valid Theurges if they waited one more level and had the appropriate knowledge skills as well.
Garuda-blooded Aasimar gets see invisibility (counts as a 2nd level arcane spell and is actually quite useful). They get +2 Dex, and +2 Wis (not optimal, but still good).
Go for Cleric 3/Empyreal Wildblooded Sorcerer 1, then Mystic Theurge (Wisdom is the main casting stat for both classes, though the Cleric still uses Charisma for Channeling).
Also, the spell progression will be staggered starting at 6th (Cleric 3/E. W. Sor 1/Mystic Theurge 2), so that every level you'll get access to a new spell level for alternating classes.
(I've played a Cleric 3/Wizard 3/Mystic Theurge, and odd levels sucked, while even levels were a bit overwhelming with all the new options.)
The Magical Knack (Sorcerer) trait is a good choice.
Just my 2cp worth! :)
EDIT: Choose Cleric domains with good 1st level abilities. Remember that those won't be advancing.
Okay, thanks for the tidbit on copycat being divine instead of arcane.
I'm probably not going to put anything about Garuda, because it's not in one of the main books, but one of the splats.
Thanks for the help!