See my post of 19 Dec. There is no such thing as a typical monthly roster. What you can be sure of is that your roster will change several times before you depart SIN and several more after you have left SIN.
You will have leave approved and then have your roster delayed down route such that you get back to SIN 3 days after your leave starts without so much as being asked if its ok.
Days off at home are variable, unpredictable and cannot be relied on.
HR are really trying to drive down terms and conditions, morale is as low as I have ever seen it and we still await our 2009 service increment (yes 2009) with baited breath.