Looks like the 7th Operation Snowdown Quest requires you to Shoot Down Opponent Structures with X-4 Stormwing. By now, we all know that the Stormwings are located near the five (5) Snowmando Outposts, so getting a Stormwing isn’t really that hard. Here are the locations of the Snowmando Outposts for quick review:
We have tried this challenge in Solo Mode and Team Rumble. We first choose Solo Mode because if you see a built structure, it is most likely an opponent structure! This is of course provided that you did not build the structure to begin with. This worked fairly well, but if you really want a chance of destroying Opponent Structures, Team Rumble is definitely the way to go. We do have two practical tips for you. The first is to get one or two gas cans after you get your X-4 Stormwing. This insures that you do not run out of fuel. The second is to hang out outside of the circle until the storm starts closing in. Why? You need to give your opponents time to start building their super structures. Hope these tips work for you.