Ive had some past experience with various angels. I had a 120 with a queen and a cherub angel and they totally ignored each other. I had a 75 gallon with a coral beauty and then added a flame. They were both really small and they fought for several days so I decided to take them both out rearranged the rocks I kept them in two 20 gallon tanks over night reintroduced them and they were fine. The only time they showed any aggression was at feeding.