Effectively 2 airframes based there with around 10 captains and 10 F/Os.
They do bali 3 times a day, one of which continues on to Singapore. The Jetstar brand does well on leisure markets so I doubt they will close the base, especially given that they have allocated new command and F/O positions recently.
Would be be more likely that Network will start doing transcontinental flying in place of qantas 737s.