cool was thinking the same about the sae was going to keep the cardinals small i want to put in some red eyes or some zebra danios at some time so there would be 2 shoals of different colours thats if they will go the tank is all looking a bit red and orange at the moment any other s i could put in instead?Right hmm, also 3 discus is all wrong, what if two were to pair up, the bullying would be really bad.
Also +1 on the clown loaches, four foot is not big enough. The cardinals are ok, but would 'look better' in a larger schoal.
I would suggest looking at and revising your stocking before going any further, i dont think there is any need for the clown loaches, replace them with discus and then get your rams. Also any sort of loach can be liable to start sucking on the discus if not careful