Talk:Divine Thuerge (3.5e Prestige Class)
as an slightly more presise version of the mystic theurge class working specifically with the wizard and cleric classes, it is conceptually sound, like from what i have read the mystic theurge was not all that good of an option to begin with so as something akin to the arcane heirophant this could work, if the class abilities were more tailored to the respective classes --The fool (talk) 13:54, 6 October 2020 (MDT)
so for changes i'd make to this subclass: the list of bonus feats could be changed to aligned theurgy, alternative source spell, customize domain, elemental theurgy, theurgic creationist, and theurgic specialist, all from dragon magazine #325 (plus academic priest from legend of the two twins and divine metamagic) since they are all feats that merge your arcane and divine spellcasting together, aligned theurgy, elemental theurgy and theurgic specialist all make combined spellcasting redundant, so that feature could be tweaked and removed.
Concentrated spellcasting is neat but the way it works for divine spells with prohibited domains is a bit awkward and with the wealth of domains available via various sourebooks it might be possible to choose an array of domains that will not affect you much, so instead i'd suggest that your prohibited school now applies to both your wizard spells and your cleric spells
FLuff wise i'd sugest emphasizing that this person is merging the art of wizardry and worship of the divine, an wizard who views the mere act of spellcasting as an act of worship akin to the wonderworker prestige class, possibly adding the prerequisite of worshipping a god of magic or by adding the requirement that one of your domains must be the magic domain or an domain closely related to your specialized school (such as the death domain for a necromancer, the knowledge or divination domain for the diviner or the trickery or illusion domain for the illusionist)
Further connecting you to both of these things might be allowing ether your turn/rebuke undead attempts, your familliar or both to improve as you gain divine theurge levels to further emphesise this as the wizard/cleric