Fleet decision
International fleets (ANC 747/MD11, SDFZ 757, SDF MD11), tend to have more "long block" type trips and reserve sequences. I *think* bottom guys on Z can generally get a 14 day reserve block with remainder of each 28 day pay period off...not sure about MD SDF or ANC skeds.
SDF A300/757 generally has a lot of week on/off sequences, but those trips typically go senior to bottom 25% or so...week on/off reserve may be possible.