

As the mission stages will require you to move fast, traditional sharpshooters will not shine very mich, Grenadiers with Shredder will be helpful. Consider taking units that are good against robotic units and have abilities that will help you defeat hard targets.
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The mission itself will feature Chief Engineer Lily Shen with a full Specialist build, she is quite capable of doing some mechanical tricks (Haywire will be a winner). You might want to prepare and take your time to do the mission, as it will appear very early in the timeline where your equipment and level might make it harder than it needs to be.

There will be a cutscene where Lily’s rover will go a bit crazy, and you have to scan for the mission to appear and be acceptable.

In the Lost Towers mission, the Derelict MECs can use their ability to “self-destruct” attack.Make ’em go Boom – Kill an enemy primed Derelict MEC before it can self-destruct XCOM 2: Shen’s Last Gift Achievement Guide
