Objective: Kill the test marked enemies

Failure Condition: Kill the emergency system

Turn Limit: 8

Recommended Echelon(s): AR/SMG, RF/HG, Dummy

Echelon Limit: 4

So, we got a whole lotta enemies we need to kill, and a whole lotta death stacks making this annoying. Time to get started.

To start us off, we want to be able to actually open the gates in this map, as we are a tad bit blocked off from one of the targets. The console on the bottom of the map opens gate one, with the one at the top opens gate two. Since there's a death stack positioned to block our path to the top console, our main priority is to get an echelon past it. 

On turn one, we want to deploy both of our combat echelons, which should be AR or RF echelons. Move the echelon you deployed on the Heavy Heliport up one node, then left two nodes. We'll also need to start moving to the bottom console as well, so start moving the other echelon there. Move one node to the left, then down two nodes. Deploy a dummy echelon on the Heliport. Specifically the normal Heliport and not the Heavy Heliport. It'll cost us extra AP to move away from the death stack that will move closer to us on turn two if you don't do this.

Speaking of, on turn two, move your dummy echelon to the left one node so the death stack moves to the left instead. Next, we want to access the console at the bottom of the map. Move the echelon that was going there all the way to the console. Use it, and it should open the gate. Now, contrary to the mission objective, we actually want to ignore No. 3 and move to the left and fight No. 15.2. We'll come back for 3 later. Continuing past No. 15.2, we want to go to the Heliport on the top left of the map, so go as far as you can with the AP you have.

On turn three, finish moving to the Heliport. Now we can finally make use of our other echelon to open up the other gate. Move them up to the console and use it. After using it, move that echelon down all the way to No. 3.

On turn four, we continue moving that echelon that killed No. 3 down. Go to the bottom-most node, right next to No. 12. Move that dummy echelon we have up one node, so we can make No. 4 move to the right. Now, on the upper left, we can move the echelon we have sitting on that Heliport over to kill No. 15.3. You can either deploy another echelon that's better suited to killing the Gladiators, or try and use the echelon you already have there. Either way you slice it, move that echelon onto gate 2. End the turn here.

On turn five we can finish up this map. Move the echelon parked nearby to console 1 and start slamming the gate onto No. 8 until it's weak. Now you can take your echelon and move through No. 8 and proceed to No. 15.1 to finish off the mission.

Video of me clearing this map