On paper doesn't seem too bad.
Try doing a 14 hour back of the clock (syd-bali-syd) duty then having 12hrs rest and rocking up again that night for the next duty. I am not a princess but I am very tired after a 4 sector 10hr 15min duty and I am entitled to 14 hours rest.
I'll be interested to see how great the Team Jetstar feel after the first 6 months.
Best of luck