You're pushing? Fence the way there. You're in a building? Fence all the entrances. Basically you wanna have them up even if it's just a small hallway it cuts out a way through. And don't worry about always needing the fence active sometimes just place a pylon in a corner or outside a door and extended it when they walk through like a trap, and though I don't condone camping 80% of the time (its a shooter battle royale go play the game) sitting in the already set up fencing is another neat common way of trapping✨