mattandy..
With the Introduction of a new system which builds rosters for Qantas Flight Attendants, Crew operating on the a380 receive a very 'fair share' roster.
A typical Roster could include 20-25 nights away from home(out of 56)..made up of generally 4 Singapores and 4 LA's. You may also have training days built into the roster for example recurrent training days.
Things do vary though in aviation and are subject to change at any time. Trips are shortened, extended even cancelled in some circumstances..so you just never know what your roster may comprise of!
T.C.M