Cleanup crew/diversity reccomendstions

[jeep and goose]

I’m trying to set up my clean up crew to have a very wie range of different inverts. I currently have: 2 turbos, an asterea, 2 other snails idk what they are, conch, 5 verity’s, emerald crab, red leg hermit, black? Leg hermit and a coral banded shrimp. Mt rank doesn’t really have any issues right now I just want it for diversity mainly. Was thinking dove snails and asterenia would be good to add and bristle worms, although I don’t like them that much moreso cause they have given me sleep parylisis on more than one occasion, also probably another hermit or 2 and I want porcelain crabs eventually, I also have a diamond goby that sifts sand, this is a 20 gal btw, so I can’t add a whole lot more. My lfs has a chestnut cowrie but I’ve heard they eat sponges and are cold water, also was thinking brittle stars

 

[Zach136378]

I think you have very good variety I think a starfish would be good but I would not recommend any starfish apart from a bristle like you said