Finding Nemo I don't really like questions like this for I don't really know alot about your system, water quality, maintenance schedule, your likes and dislikes of fish ect, ect, ect. There is more to adding a bunch of fish to any system and each system has it's own strengths and weakness's. In honesty I really don't recommend overloading a system like I have. Too many issues to worry about. As you mentioned damsels and clowns really don't coincide together in groups the best in home aquaria unless you have a very large system. One thing I have found is that adding more load to any tank requires more time, more effort and more money.