You might have problems with all of those fish, it will be like playing gladiator, the strong ones will kill off the weaker ones and you don't get to decide. If you don't mind death and destruction, let nature figure it out. For that size tank and once it's cycled I'd keep the clown and add a firefish and maybe a few other small friendlys.
Damsels can be tough to catch and are territorial. Hopefully your LFS exchanges fish. Spend a few days researching before each new addition or change you make.