Modern Spitfire deck

Any thoughts on how to improve this? http://deckbox.org/sets/368108?v=v

Main combo is using pingers and a bit of classic red burn to buff the hell out of Chandra's Spitfires.
Temporary creature steal, combos with fling nicely. Time Bomb.

I'm fairly certain that either of the other Chandras would work better in this deck, but I do not own them personally.