i installled my 780Ti and the nvidia drivers, and now i got it to work. Overwatch using DXVK at low to medium settings 60fps. with occasional stutters but i didn't notice them that much. i still had a lot of fun playing.
the only problem now is that my blizzard app is broken. i need to launch the game manually. but i'll figure that out. can't be too difficult.
but besides that it's working now.
i don't really mind having to play at medium or low settings. to me the convenience of not having to dual-boot is way more important.
*disclaimer* i don't play competitive, so if you do your experience may be worse considering it does still stutter sometimes *disclaimer*