Objectives: Defeat both bosses (Agent 416 and Agent Vector) and capture marked node.

Echelon Limit: 2

Turn Limit: 14

Recommended Echelon(s): Dummy (x2)

So for this guide I'm actually just gonna say fuck it and go for the achievement at the same time. It boils down to doing the same shit anyway, just this time we're only using the Vector NPC echelon. It makes things a bit simpler too. 

Our first goal is to take care of Agent 416. She's chilling on the marked node, so head straight there with Vector. Grenade all of the enemies in your way; you definitely don't want to take fights with your Vector echelon. Once you make it to the marked node, grenade Agent 416 to deal with her. You should have Agent Vector right above you as well, so let's start dealing with her.

Move down so you don't fight her. You definitely don't want to take a fight against Agent Vector until she's nice and weak from turrets. That's why we want to deploy as many turrets as possible to lower her HP. Deploy them in Agent Vector's path and some on the nodes adjacent to that path. You'll want to move back as she chases you and put more turrets down as you retreat. If any other enemies show up, toss grenades at them. 

After five or six turrets, you should be clear to engage Agent Vector. I'd toss a flashbang on her to seal the deal. Once you down her, head to the marked node and capture it. That should end the map.

Video of me clearing this map