I wouldn't rest Clarke. He needs time in the middle of the park to be ready for the World Cup. I'd think about giving some of the out of form players and inexperienced players a long run in the team, while resting guys like Watson, Lee and co. Alternatively, dropping some of the out of form players for grade cricket might just be what's needed. I'm sure Johnson, Bollinger and Haddin could do with a bit of time in grade cricket. For the rest of the series, I wouldn't be too upset with a team looking like:
Clarke
Paine
Hussey
Ferguson
Smith
White
Hastings
Christian
Siddle
Doherty
Copeland
It gives a few of the World Cup squad a shot at cementing a spot and it introduces a couple of young guys to the side post World Cup. Now is the time to experiment with a few combinations/players.