15 is what I'd run with to get the CPU to get some plays.
Also, I think 10 may be a tad high for QBA. Matt Flynn is completing 67% of his passes through 5 games. Granted I don't know his ratings, but that seems to be a bit high, but I also don't take many shots downfield, and most of my throws are 8-12 yards....I've also become quite proficient at dumping it off to a back or a TE for a 2 or 3 yard gain, when my first, and 2nd read isn't open.
I'm guessing I have about 3.5 seconds before the CPU line does their damage, but sometimes they just blow things up.
I like them, and when things are finalized, I'll start a real career and not just play the games and sim everything else.