groups of two or three isent a good idea. the weakest could die/get killed
u know if clowns are together.... well, its alot more complicated than a simple answer. theres alot of dominance and flirting first
your diet for the fish seems ok, but id 86 the brine and replace it with mysis, alot more nutrition
cheapest shouldent count in the anemone world.. if its the 55 gal your putting it in, you have a couple options, but the easiest to care for is the bubble tip (and easiest doesent mean easy. your tank must be perfect perimeter wise, among other things)