LOOT_MULT is how much gold they take if they occupy a province. I'm not sure of the exact formula, but the higher this is, the more gold you'll get when defeating barbarians that have looted.
I've fiddled with the others and never really noticed a difference anywhere, so can't tell you. CONQUER_LOSS should probably be the amount of people lost when the province changes hands, but I distinctly remember changing it to no effect.
I've fiddled with the others and never really noticed a difference anywhere, so can't tell you. CONQUER_LOSS should probably be the amount of people lost when the province changes hands, but I distinctly remember changing it to no effect.