But he's already 4th level, and the feat can only be taken at first level.
Hmm...retraining, PsyRef, or if it's not a fully formed character yet, just erase it and write it down at 1st? So long as the game hasn't commenced, no reason it can't be retrofitted.
EDIT : Found it in my own post on 339, originally by zorgling.
Factotum 1/Wizard 4/Unseen Seer 4/Abjurant Champion 5/Eldritch Knight 6
I'd go with the Changeling sub level on Wizard, and go Focused Specialist with it, then grab a Tome of Ancient Lore to make up the difference. FS on dual spec will give you even more spell slots, and over time, anything lost (4 schools total) will be made up for by the ToAL having every spell, ever. Roll in
mirror move off of the wizards site for Dragoonery, Valkyrie form for maneuvers if ToB is your thing, or Planetar form if you like Cleric buffs, and above all else,
play on your versatility. You can literally become anything at will.