At USA Jet plan on 20-25 hours a month. No joke it is whats it is. Most of the job is duty time sitting, waiting, or loading, and unloading freight. I averaged 70 nights away from base a year.
No airline cares between an MD80 and 737. A jet is a jet. Id guess the Atlas flying is a bit less fatigue run then usa jet but probably more flight time. USA Jet is max duty days normally or thats atleast what you expect.