You can shut off swap file with 12G. Swapfile seems important but its not for our purposes. In fact with 12G you can make a ram drive in the ram which is faster then SSD. But you have to read the wow folder to the ram drive everytime you start up.

Just get the swapfile out of the picture, put it on any old drive and be done with it. The wow folder is what needs to be fast. Wow does NO WRITING after you enter the game, its all reads.