That site is good at its detailed info on boss strike enemy formations and unit's attack pattern graphic but the wiki wins hands down when it comes to user input and interaction. Damage output of attacks by rank is missing there too. :)
Actually, if I could get a server, I could do something of a fusion of the two.
MediaWiki software is free, but it won't look like Wikia, but it has more flexibility. I can also attach a bot to handle the JSON conversions. It's not hard, as all battle formations are stored in a JSON file.