I didn't see the second part of the equation, and you also didn't ask... but if you close accounts, not only will it not help your AAoA, but it will put a **bleep** in your utilization as your available credit will be reduced. So... if they don't have fees attached introduce them to your sock drawer.
Back in the garden!
App free since 23Oct2012 reset to 27Aug13 and reset again 4nov13