The first response is quite wrong. If you had a desktop and a real GTX 860, you'd be doing so much better. But you have a laptop, and no upgrades to CPUs or GPUs are possible in laptops. Only a Radeon can truly be relied upon to work as intended in laptops.
The entire front end is ripped out of a real GPU to create an "Optimus" that is cheaper than actual GPUs can be normally. As a result, they are unstable, undependable, and IMO, next best to useless in EA games. At present, AFAIK, there is no working driver for an 860m in Battlefront, on top of everything else.