my suggestion would be: get rid of the damsel if you can, unless if it's a chromis, then maybe you can add another 3-4 and you have a school... then, prolly get a tang (yellow, purple, or regal)... prolly a dwarf angel (flame, lemonpeel, or coral beauty)... lawnmower blenny, jawfish, purple firefish, get a pair for your maroon clown...
i think you'll be set.... just be patient on adding the fishes, wait atleast 3-4 weeks on additions... here is how i would add them..
1 --> 4-5 chromis
2 --> lawnmower blenny & maroon clown
3 --> jawfish
4 --> purple firefish
5 --> dwarf angel
6 --> tang
there is a lot more i can think of.. again, make sure to be patient on you additions... have fun and good luck...