Play Conflict mode, I did it in singleplayer with the following settings:

General

• Window mode: Borderless full screen
• Render scale (1680x945): 70%
• FidelityFX Super Resolution 1.0: Yes
• V-Sync: No
• FPS limit: 60
• Draw distance: 1450m
• Nearby depth of field: No
• Use 2D scopes: No
• Use software cursor: No

Post-processing

• Post-processing anti-aliasing: None
• Depth of field quality: None
• Ambient occlusion (HBAO): Medium
• Screen space reflections: Low
• Contact shadows: Yes

Quality

• Hardware anti-alising: 2x
• Foliage smoothing: Grass+trees
• Model geometric detail: Low
• Object draw distance: Medium
• Terrain surface detail: Parallax
• Texture detail: Medium-High (As I said, I'm constantly changing it when the VRAM gets full to reset it)
• Texture filtering: High
• Grass quality: Low
• Grass draw distance: 60m
• Shadow quality: Low
• Distant shadows: None
• Render target format: Standard
• Enviroment quality: Low

System information:
CPU: AMD Ryzen 7 3750H with Radeon Vega Mobile Gfx 2.30 GHz
RAM: 16GB
GPU: NVIDIA GeForce GTX 1650 with 4 GB of VRAM
Game is on an SSD

With this system and settings I can run the game on 50-70 fps depending on my situation, but upon the VRAM getting full, it drops to about 10-20 fps.