Sorry, can't help you much as i'm not a pilot.
I believe they're still recruiting via PARC or HACS for F/O's on the B747 fleet but based in SFO or JFK. B747 schedules are produced at base.
The B744 is moving along with 80% of AMS crew either requalified on type under JCAB regs. I had heard that they're going to recruit B744 qualified crew soon but not sure when.
Rosters are generally 10 days off per month with intermittent flying inbetween. Rosters for this fleet are generated in NRT.
Best bet is to contact PARC or HACS.
Good luck.