That's a lot of fish and coral for 2 month period.
you dont have to slow down adding corals.. you can add as many as you want at a time as long as your parameters are good... corals wont efeect your levels as far as trates, trites etc..
also call me crazy but i only see a yellow tang, a clown, and two damsels
thats 4 fish(3 small) in two months...
i think hes fine for now