It would work, but theres a lot of fluff behind it and seems feat and fluff extensive. Hard to work into any character in front of a DM.
I could only see this working on a Human (since Precocious Apprentice requires you to be a 1st level character) and thus only limits this combo to Humans. Thats not bad, but its restrictive.
I may be asking too much for any forms of alternative but if these are the only ways then they'll do. I think it is too much of a request to ask. Still, I'm wondering about Precocious Apprentice granting a Warlock / other "arcane caster" (lets say Shadowcaster) a 2nd level spell slot. It says to choose a spell from a spell school you know or something, but doesn't that just mean one that isn't banned to you?
But at any rate, I really appreciate the help guys :)