With the high numbers of duty hours required it would be impossible to build a roster with many "away" slips in it within the confines of 28 days, even with minimum rest between duties.
Priapism.
This is my point. If you fly somewhere on a long sector and the next flight doesn't arrive for 3 days, what do you do?
Do you pax on another lcc to another location to operate out of that port eg Arrive Phuket pax to BKK, overnight and operate BKK - MEL.
If Jet * can't make a roster work so Cabin crew can't work the prescibed hours. Will they receive less pay? If the answer is no, early days in Jet* Int could be quite cruzy