Currently playing a druid(3)/mage(3)/theurge(5). My feelings so far.
Being one/two spell levels behind can reall hurt. When the enemy is panning you with fireballs and you only have melfs acid arrow the maths doesnt balance. Fortunately there are some "dead" levels for mages, 5th and 6th notably dont have obvious ass kicking spells, so this isnt so bad at these levels. Further because of the cap of 9th level spells you eventually catch up.
You have ALOT of spells. This is realy cool if you are the THIRD spell caster.
Having played the class I strongly believe that if you already have a cleric and a mage who can ensure that the party have acess to the top level spells then a theurge is an awesome addition to the group. The theurge is the best buffing machine in the game, I can buff both party fighters and still have spells left over to cast in combat.
However if there is not a cleric and mage already the party will suffer for not having the top end kick.
Theurges make great archmages, because you can dump divine slots for arcane powers
Majere
Being one/two spell levels behind can reall hurt. When the enemy is panning you with fireballs and you only have melfs acid arrow the maths doesnt balance. Fortunately there are some "dead" levels for mages, 5th and 6th notably dont have obvious ass kicking spells, so this isnt so bad at these levels. Further because of the cap of 9th level spells you eventually catch up.
You have ALOT of spells. This is realy cool if you are the THIRD spell caster.
Having played the class I strongly believe that if you already have a cleric and a mage who can ensure that the party have acess to the top level spells then a theurge is an awesome addition to the group. The theurge is the best buffing machine in the game, I can buff both party fighters and still have spells left over to cast in combat.
However if there is not a cleric and mage already the party will suffer for not having the top end kick.
Theurges make great archmages, because you can dump divine slots for arcane powers

Majere