restocking tank

hello my tank lost alot of fish about 2 months ago but know i have fixed the problem and want to add more fish.
my leftover fish are 3 chromis and a clownfish
i wanted to get some nocternal fish because i have these cool led blue lights that came with my t5 system. but when i but them on my tank looks like a ghost town.
i would like to add
1 squirrelfish or soldier fish
2 cardinals not sure what kind
and an angler
also are angler fish revitly hardy fish, and is feeding frozen krill ok
my tank i fifty gallons and has a bunch of good hiding spots

 

i think squerrelfish get a bit big for a 50 gallon tank, also an angler would be a bit crowded as well. i would stick with the cardinals.

 

im ok with out the angler, i did more reserch and the only anglers that are small enough not to each my smaller fish are two expencive
also i thought that a squirrelfish would be good in my tank because unlike other fish there size(such as tangs and wrasse) squirrelfish hide most of the time

 

also what about leaf fish

 

bump

 

bump