Alright, my issue is regarding the pretty poor performance I seem to be getting with this game. It's really irritating and makes the game next to unplayable for me with how slowly things end up moving after just playing for 30 minutes. I start at 60 FPS and then it goes all the way down to 18 FPS in the matter of 20 - 30 minutes every time. It's honestly game breaking for me, I can't handle playing this kind of game in that frame rate, especially during fights. I'm wondering mostly if it's an issue with my configuration or optimization on the dev's end because I can pull 60+ FPS in most new (drastically more intensive) games.

I've definitely seen a lot of topics regarding this problem but they're all with notebooks and relatively older hardware that isn't too surprising, but I've got a relatively powerful rig to the point where there aren't a lot of games I can't play at 60FPS+ smoothly for hours on end. I've also never seen this sort of issue where the game can go for half an hour before hitting unplayable frame rates

Setup:
CPU: AMD FX-6300 @ 3.5ghz
GPU: Gigabyte GTX 660 Ti
RAM: 8 Gigs @ 1886Mhz (O.C.)