There's also nation-specific price variables; Fordo Boggit's mob costs less for Ulm to hire, and I can also remember the price being doubled for an undead mercenary team for Marignon (I think it was Ghoul Father).
This doc is a welcome, and extensive, revision to his old "unitattributes.xls", so I highly recommend that anyone who downloaded it from Sunray's or my site get this new Version. (I've updated my own page with this Version.)