get rid of the tsn and Pbass if you want cudas and atf and plan on putting that armatus in there.
if you want rays go for it, but try finding the tea cup type rays [hystrix,retics] can get away with a motoro for a year maybe more if purchased small.
if you decide to do that i would go 1-2 rays, armatus, maybe 3-5 freshwater baracudas and maybe 1-3 ATF's, and you mentioned polys i would put maybe 3-4 tops in that tank whatever size.
good luck nice tank