All of the Wikia families nicepath() values are incorrect for some of their sites.
$ python pwb.py shell
Welcome to the Pywikibot interactive shell!
s = pywikibot.Site('en', 'lyricswiki')
The same occurs for families wikia and wowwiki.
However the nicepath should be ''
Likewise the main Wikia and main WOW sites do not have a /wiki/ prefix
However Wikia has a redirect on the server from /wiki/ to / for those sites.
However the /wiki/ is needed for some sites.
So keeping the nicepath as /wiki/ is necessary, and we have to hope Wikia has redirects in place for all wikis where the wiki nice titles are not located at /wiki/Foo