Here's my modified version that spreads its abilities out over several levels, adds domain powers and reduces Turn Undead effectiveness while eliminating spontaneous casting.
Mystic Theurge Variant (Core Class) By Jeremy Summers
(Iron_Chef variant)
Key Abilities: High Wisdom and Intelligence Scores are essential. High dexterity is useful since this class prefers to wear light armor, if any at all. A high constitution is useful, as they are not very sturdy.
Hit Dice: d4.
Abbreviation: MTv
Class Skills:
The (MTv’s) class skills (and the key ability for each skill) are Concentration (Con), Craft (Int), Decipher Script (Int), Diplomacy (Cha), Heal (Wis), Knowledge (any/all) (Int), Profession (Wis), Scry (Int), Sense Motive (Wis), Spellcraft (Int).
Skill Points at 1st Level: (2 + Intelligence Modifier) x 4
Skill Points at Each Additional Level: 2 + Int Modifier.
Class Features:
Armor and Weapon Proficiency: (MTv)s are proficient with all simple weapons. They are not proficient with any armor nor with shields.
If the MTv chooses War as one of his Domains, she gains proficiency with her deity’s favored weapon, be it simple, martial or exotic, as well as the Weapon Focus Feat for that Weapon.
Spells: MTv's are capable of casting both divine and arcane spells, though neither will be as powerful as those of a Wizard or Cleric of equal level. At first level, the MTv gains spells per level as both a Wizard and a Cleric, and every level thereafter she can choose to increase her spells per day as either a Cleric or a Wizard; and every 5 levels, (starting with 5th) the caster gains spells per day as both Cleric and Wizard. However, no matter how many spells per day the caster has in either divine or arcane magic, their (MTv) level is used to determine caster level for both Divine and Arcane magic. Intelligence modifier is used in relation to Arcane Spells, and Wisdom in relation to divine.
One downside to this is that the caster must take time at the beginning of each day to both study/memorize her arcane spells and pray for divine spells.
Familiar: At 3rd level, an MTv can summon a familiar in the same fashion that a wizard can.
Chaotic, Evil, Good, and Lawful Spells: Identical to the Cleric, though this also applies to arcane magic.
Turn or Rebuke Undead: As Cleric, using the MTv level as their cleric level.
Bonus Languages: The MTv’s list of bonus languages includes Abyssal, Aquan, Auran, Celestial, Draconic, Ignan, Infernal, and Terran in addition to those available due to race.
Craft Single-Use Item: At 3rd level, the Mtv can create any one-
shot magic item (potion, scroll, talisman).
Bonus Feats: Every five levels, the MTv chooses a divine, item creation, or metamagic feat.
Base
Attack Fort Ref Will
Level Bonus Save Save Save Special Spells Per Day
1 +0 +0 +0 +2 Domains, Turn Undead As LVL 1 Wizard & Cleric
2 +1 +0 +0 +3 +1 LVL Divine or Arcane
3 +1 +1 +1 +3 Summon Familiar +1 LVL Divine or Arcane
4 +2 +1 +1 +4 +1 LVL Divine or Arcane
5 +2 +1 +1 +4 Bonus Feat +1 LVL Divine & Arcane
6 +3 +2 +2 +5 +1 LVL Divine or Arcane
7 +3 +2 +2 +5 +1 LVL Divine or Arcane
8 +4 +2 +2 +6 +1 LVL Divine or Arcane
9 +4 +3 +3 +6 +1 LVL Divine or Arcane
10 +5 +3 +3 +7 Bonus Feat +1 LVL Divine & Arcane
11 +5 +3 +3 +7 +1 LVL Divine or Arcane
12 +6/+1 +4 +4 +8 +1 LVL Divine or Arcane
13 +6/+1 +4 +4 +8 +1 LVL Divine or Arcane
14 +7/+2 +4 +4 +9 +1 LVL Divine or Arcane
15 +7/+2 +5 +5 +9 Bonus Feat +1 LVL Divine & Arcane
16 +8/+3 +5 +5 +10 +1 LVL Divine or Arcane
17 +8/+3 +5 +5 +10 +1 LVL Divine or Arcane
18 +9/+4 +6 +6 +11 +1 LVL Divine or Arcane
19 +9/+4 +6 +6 +11 +1 LVL Divine or Arcane
20 +10/+5 +6 +6 +12 Bonus Feat +1 LVL Divine & Arcane
Going Epic:
The (MTv) when reaching epic levels continues to gain spells as normal, except when spells per day reach 20th Cleric, no more spells per day are gained(as normal for an epic cleric) and when spells per day reach 20th Wizard, the (MTv) can gain 2 spells per day of any level, as is normal for an epic Wizard.
Epic Bonus Feat list is a combination of those for Cleric and Wizard.