The user with the 184.108.40.206 IP address has been deleting and falsifying information. On each of these, he puts "Kamond" in the edit summary, so I suspect he's doing this to spam that word. He's been doing this for over a year on at least six wikis and doesn't appear that he's going to stop. I recommend a block of at least six months.
If you need help figuring out what kind of rangeblock to use to cover the various IP addresses he's edited from, I can supply that.
Take a look at our webinar series -- where you can sign up to interact with Wikia staff, as well as watch past sessions
Be sure to check out Wiki Features to see what features you can enable on your wiki!
Explore our forums on Founder and Admin Central to see what other wiki admins are asking.
Lastly, visit our Help Pages to answer any specific question you may have.
All of the above links are a great place to start exploring Wikia. If you get stuck or have a question you can't find the answer to -- please contact us here. But most importantly, have fun! :)