No, you can't normally wait to meet any prerequisites for a feat or prestige class. You have to qualify fully for it at the level you gain the feat or enter PrC. So you couldn't take Knowledge Devotion until 3rd-level and couldn't take Clinging Breath until 6th-level, minimum, since KD requires 5 ranks in a skill (which isn't allowed until at least 2nd-level) and your DS levels won't give you a breath weapon until 4th, and the next feat slot after that is at 6th. Just pointing these things out so you remember them for the games you've joined in or later join in.As for taking it, as far as I know it is allowed to 'wait' with the feat for prereq purposes up to level before you would get next feat (in this case up to 5th level), only skills need to be spent immediately.
Knowledge devotion needs knowledge 5 ranks. If you don't like I'll replace it too, it's not like character concept depends on it. It was suposed to reiterate that Eugene is more sophisticated then his barbaric upbringing.
Another question: Do wondrous items have a weight if it's not specified?
How will the answer affect your character design?
Looks as if I need to make a bit of an apology- I guess I'm just a terrible person. After going to all the trouble of putting together three concepts (which used up a good portion of my weekend), I ended up having a flash of inspiration just before I went to bed last night. After playing with the idea at work all day (albeit without any books or computer access), I've decided to pitch a different idea- I'll put a capsule here, and generate a finished version as soon as I am able. Consider my other concepts withdrawn- unless this character gets too close to Calahan's flamethrowing antics...
Last concept/actual character pitch:
Sister Gwendolyn Emberbright; Human female; Cloistered cleric 3/Warmage 2 (further advancement in warmage, into mystic theurge at level 8); Sister Gwendolyn is a member of the Order of the Sacred Torch (commonly called "Torchbearers"), an arcane arm of the Church Militant. Members of the order are scholars and arcane casters who serve the church and the city by wielding combat spells instead of physical weaponry. Her domains would be Fire and Magic (And Knowledge, as a cloistered cleric). She is well-educated, especially in arcane or religious matters, but rather naive. She also REALLY enjoys spellcasting- the bigger the bang, the better, and justifies her enjoyment by making sure she picks deserving targets.
One last silly question, before I go to work on this: Is Ezra a male deity, female deity, or gender-neutral deity?
Fr. Berman's Order of Fate (How does Ordo Fata sound to you?) calls Ezra "Our Lady of Fate" and teaches that the path to salvation involves carefully prepared ritual and dedication that will lead, through faith, to a predestined fortuitous outcome.
Sorry, it must be then house rule. In four games I play longest it is valid rule to wait with taking of feat.
I'll adjust charsheet soon.