I was able to very quickly, and quite easily obtain this trophy on Chapter 1: San Francisco.
Avoiding spoilers as much as I can; once you make it above ground, after killing a whole bunch of chimera with your allies, you will come across your first Auger lying upright against a building wall, just beyond this building will be a whole bunch of chimera hiding behind crates, which is a lovely place to let them shoot at your barrier, which you use
to activate.
If the enemies there are already dead, then the place I got it is a little further ahead, you'll come to a slope area that has a catwalk with a whole bunch of chimera, then below it are the flying bot enemies, I used up 3 of my barriers completely and the trophy soon popped afterwards. If I remember correctly, the slope will pop a checkpoint for you too, so it shouldn't be hard to find the right place.
There is MANY places you can easily get this, but this is the place that got me the trophy shortly after picking the Auger up.