Simple - you can activate ambush, but instead of shooting, you walk all 3 stalkers, while the enemy patrol is freezing.
This can be useful in many scenarios. Since currently, after an ambush, some of your stalkers may turn on their flashlights (probably a bug). The safest way to move stalkers away from a nearby enemy, is during combat mode.
When there’s tight timing to sneak across a gap between 2 enemies, freezing them will be a wise choice.
You can use mutant skill like jump, frog jump or moth wing. I haven’t tried if frog jump or moth wing allows you to bypass fence gates without finding the keys - It may accurately work.