Rare monster death animation

I would like to not have this animation or an option to turn it off as it's murdering my fps i have a 1080 gpu and i7-77000k cpu, it's rough out here i cant yet to invest 5k dollars into a computer, and this is most annoying when im doing leagues mechanics like breach where are alot of rare monsters.Also i feel like the maps in campaign are quite big even tho like it in some way bcs it puts you in that atmospheric setup but they could be a bit reduced in size.