Aliens: Fireteam Elite

The easiest mission to accomplish this on is Giants in the Earth:Evacuate . You will need to have a strong team, and be equipped for range with your loadout. Further use a challenge card that improves your performance (I used human tanks, but this will depend on your play style). Save all of your consumables for the last room. Before you get to the final battle, there will be three major battles. For each, the strategy is the same, backtrack to the last room before initiating combat and pick off androids running at you from range This will cause the androids to spread out so you can focus fire and eliminate most without any damage. Lastly, once you get to the final room (where you shut down Cynthia), use all of your consumables and proceed as normally.

Good luck!