i7 + 1060 + 256GB SSD will be fine. WoW FPS has been kind of flaky in BfA, on any machine, but that will be plenty even for raids. My only concern is the screen size. I hope you will also have an external bigger screen to use; 15" is too small for comfort, at least for me.
You will probably want to install WoW on the SSD to speed up loading screens, so it’s good you have the regular 1TB drive as well.