Automated Defense is a heavy armor set. When you use an Ultimate ability, you and the closest 2 allies within 28 meters of you gain Major Aegis for 10 seconds, reducing your damage taken from dungeon and trial monsters by 15%.
This set is most commonly used in situations where you get a lot of incoming damage, and it works best in combination with cheap Ultimates. The 2 closest allies will get the Major Aegis buff, so you need to be aware where you want to position yourself for the right people to get the buff.
The Automated Defense set is part of the Morrowind Chapter. It drops in the Halls of Fabrication Trial in Vvardenfell. You can acquire heavy armor, weapons and jewelry of this set in the Clockwork motif style.