My cats FIGHT, help please!?

You introduced them ALL wrong. You took a female cat and threw her into a different female's territory without any preface. You should take them to neutral territory where they've never been and let them interact for a while. Then keep them separate for a while. Let Dinah roam one or two rooms and Daphne get the rest of the house for a few days. Then switch. slowly let them around each other under supervision until you're 100% sure they won't be harming one another.