Silence.
Everything's fair in the hardest difficulty. It doesn't make it easy, just manageable.
For example in horizon if I'm running up in a bandit camp in going to ru. To the middle if the camp and whistle in my bull robot.
Then heads is getting buss and wigs are getting split
That's not what I consider exploiting.
Exploiting is using the lure call whistle over and over to silent strike enemies. Didnt use that shyt once.
I even threw away my silence armor since that shyt felt op and just used the carja fire resistance armor for the look.