Entering combat before seeing mobs "rings"

Does anyone know if it is possible to enter combat mode from far far away?

Id like to let my duck start the fights by sniping at mobs from max distance but i cant figure out how to do that. As i do now i have to put one of my mutants close enough to the mobs so that the game allows me to enter combat mode… ?

Split the team, leave Dux far back and then sneak up with one of the others and initiate and ambush.

If you want Dux to start the fight at max distance the best you can do is have the flashlight on and test the limit of the ambush option outside of that ring.