If you look at the reps in a game for different defensive positions, db's have historically under Smart not rotated, often paying the whole game. Which means you can find your best 5 and play them the whole game, barring injury. Here's a thought on how to get the best five out there.
First off, the cornerback position has been killing us. There is a big enough sample size on Everette to conclude that he is incapable of defending a pass, it's time to move on. I'm not as down on Humphrey and Harris, but it's time for them to step it up. This may seem crazy to some, but here's a thought for our starting 5.
Corner: Robinson- I get that he's a freshman but Smart was extremely complimentary about his recent play. Could he honestly be worse than Everette. You could sub Humphrey and Harris at both corners and closely evaluate their play as the game progresses. Whoever demonstrates that they can cover somebody should progressively get more reps.
Corner: Starks- It's been said many times that he can play any of the secondary positions. His flexibility would mean that he would still get reps at safety and star, and he wouldn't leave the field.
Star: Aguero- hasn't been atrocious, but the position has taken a step down. When substituting Humphrey and Harris at corner, play Starks at star. Once again, Starks never leaves the field.
Safety: Jackson and Bolden play the safety position and don't leave the field unless they are injured.
Some people may not like the notion of starting two freshman in the secondary, but if they are one of your top 5 db's then you have to play them.