I would drop the banggai for your tank size. That would leave just one clown fish. Depend on which type and how big of the clown fish to get, the only fish may get over territorial in a tank of that size. You may want to get a pair of small clown fish and let one of them to be the dominant female. This way, your tank would be lively. Just be careful on water parameter, otherwise, a deteriating anemone is going to kill the whole tank fast!