Depends on what you're looking for. The game normally is confined to an area, e.g quest wise a lot are "talk to npc a, b, finish quest..get massive rewards. By the way, the two npcs are next to each other." so you won't really need to consult wiki that much (game really is pretty simplified) so if you're going for what drop what, consolegames is a good wiki, XIVDB sometimes. Looking for who sells what etc, even SE's database site is fine.
You won't need a wiki for this game unless it's for very specific things unlike XI where there's a lot more to it and like in most MMOs, if you skip dialog you won't know what to do because between XI and XIV, skippin dialog in XIV will still visually show you where to go, whereas in XI you will miss that information.
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