Honestly, I would never try running an MMO with Wine. Those games are a constant moving target with frequent patches and changes to them. Even if something works now there is a fair chance next patch it may not. Assuming you have the option, if ever there was a game to bootcamp, an MMO would be it imo.
I guess if you don't have bootcamp it is worth trying but I'd be hesitant to invest any money in the game since your ability to play it ongoing will always be questionable.