A cleric worshiping A god of war shouldn't be getting life domain powers, for an arbitrary example.
I don't really think a "battlefield medic"-type cleric of Tempus who focuses on healing to return soldiers to the fray and thereby prolong/intensify wars is actually that bad of a concept, particularly since the Life domain's heavy armor proficiency already implies some emphasis on martial training, but I agree with your overall point that some combos don't make sense.
