They have never hired direct entries for the B744, so no one will be able to give you the figures that you seek. However, I will say that you are confusing salary with earnings, the basic is about $10k, the top scale about $16k (But you will never earn this). Earnings are based on productivity, overtime etc, but as I said, there are no new hire expats on this fleet, so no one to compare salaries with
I will give you the same advise as the previous guy, if you have the experience for the B744, then ask for the B777.
Mutt