Inverts are great but not necessary. I still highly recommend them. Also cleaner shrimp are great, I finally acquired one. I also have a coral banded, and gold banded, as well as two peppermint shrimp. There very interesting, and the peppermints will jump on my hand while cleaning the tank, or hand feeding the other shrimp. Snails will keep alage in check, as well as eat detrious. If you want hermits id stay away from the blue legs. They can be aggressive, and evict snails.
Trust me it's a lot easier letting them do the work