Hey 
just made a config which does not transform the game into a potato to the full extent.
disabling mostly eycandy stuff and lowering the texture resolutions to 50% of standard ‘low’ settings.
Additionaly I focused on keeping effects like Aura’s healing station aoe visible.
Notes:
- notable fps boost by keeping some kind of visuals
- made POST ‘Phantom nerf update’ (July 23 2015)
- includes 60fps cap
bSmoothFrameRate=True <- change to ‘False’ to disable
MinSmoothedFrameRate=5/22
MaxSmoothedFrameRate=60
- Full HD Resolution
ResX=1920 <- your resolution
ResY=1080
How to use it:
1.Open file explorer and go here: C:\Users\YourUserName\Documents\My Games\UnrealEngine3\ShooterGame\Config
2. Make a backup of your original config file (ShooterEngine.ini).
3. Rename the downloaded config to ShooterEngine.ini and copy it over your old config. Make sure not to delete backup by mistake.
4. Open the file in notepad and search for ‘ResX’, change this and ResY that’s right below it to whatever is your resolution. Save changes.
5. Right click on the ShooterEngine.ini -> properties -> set it to read only.
credits to LulNope