I need help sorting my tank out! :(

[Atmos]

-100+ brittle fish. 1 giant green one.
-1 mandarin dragonet
-1 lawnmore blenny
-1 maroon clownfish
-2 orange clowfish
-2 blue damselfish
-1 shrmip, 1 peppermint shrimp
-3 snails
-7 hermit crabs (3 blue, 3 red leg, 1 vacuum crab)
-2 tiger cowries (Cypraea tigris) Family: Cypraeidae (for sale)
-4 feather dusters
-??? common bristleworms
-almost no aspasia <<killed regularly
-1 Sailfin tang
-1 Arrow Crab 6-8"
-1 Sandsifting Starfish

-1 hard coral polyps
-2 green star polyps
-3 actinia equina anemones (2red, 1pink)

its a 90gal mh lighting (800+w) with LR and LS 2 protein skimmers, sump, fans

so i need to sort this out i dont know whats compatible with what the maroon clown and orange clowns are getting along. aside from that my crabs have been eating my live seasifting starfish so i need to make changes. also i have a few black long spiked sea urchins on the way...