Thinking of getting back into WoW for casual play/occasional raiding. I have a 2015 MacBook Air, 1.6Ghz running El Capitan. I know I'd need to run graphics on low and I have a stand and fan to keep things cool. I have an external Apple monitor at home that's provided by work so screen size isn't an issue. I played on hardcore raiding guilds overseas so I'm used to dealing with low FPS and lag now and then. How viable is the Air for playing until I either tire of the game once more or can upgrade to a bigger computer? Thanks.