We explore how planetary parameters, such as ocean salinity and planetary obliquity, can synergistically impact exoplanet climate and enhance the habitability of those worlds, particularly for cold but temperate climates. Our experiments with early Earth stellar flux and present-day Earth atmosphere range from globally glaciated to ice free- producing distinct climate states between otherwise equivalent simulations. Salty oceans may therefore expand the region of the HZ suitable for complex life.This is important to consider in planet climate modeling and must be accounted for in future exoplanet observations.