Considering Precocious Apprentice non-abusive isn't exactly a huge leap, it's arguably the original intent of the feat after all, why else make a feat expressly to allow casting of a second level spell? I did state distaste at Imbue with Spell Ability, I just can't think of a reason why it doesn't work RAW at that moment, and I still can't think of a patently good argument against it other than 'no'.
Next on the list, no, it doesn't require the same amount of rules abuses, Pun-pun requires investing divine ranks in squirrels as a basic part of his divinity ascension for Pete's sake, meanwhile the abuses used in this pseudo build are much smaller leaps of mental continuity. Also, no high level caster should be burning through their spells at that rate because it is a flat stupid waste to leave yourself open in such a manner. You can assemble all the buffs you want, but a proper dispel from someone specced for it will leave you quite out in the cold, unless you have invested a vast amount of resources into it beyond even the basic preparations of people with crafted contingencies tailor made by the char-op boards to stop very nearly every effect that *might* take them down.
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Currently playing: Chrono Trigger DS, Pokemon Platinum, and Super Mario Bros. 3