Stellar Blade

Story-related, cannot miss.

Once you've completed the “Light of Hope” main mission, you'll depart for Matrix 11 during the main quest, “Alpha Signal,” as EVE and her team track down the second Alpha Core.

After you've passed through the Collapsed Bridge area, you'll enter the Rail Yard, where you'll have to defeat the Elite Naytiba, the Stalker, to proceed. The Stalker is one of the game’s more agile bosses and has an insane amount of moves. Most of his biggest combos are 4-5 hits. The most popular ones are 4 attacks (1, 2, 3, pause 4) and 5 attacks (1, 2, 3, and 4 in quick succession, and then 5). These are when you want to be Perfect Parrying if possible.

Stalker also has a blue and purple lethal move, so use Blink and Repulse respectively there, as well as a couple of AOE attacks - when it jabs its head into the ground, retreat. 

Basically, whenever he glows gold, run back/dodge as quickly as you can too. Whenever it jumps up as well, dodge backwards quickly, as that attack deals some serious damage. Other than that, watch out for its charge attack where it charges at you, as well as some funky melee combat when it’s lying on its back. Like I said, this one has a massive skill set of moves!

Be aggressive, Perfect Parry those melee attacks, and use your Beta attacks where possible and you'll be okay - especially if you can disrupt its gold (AKA unblockable) moves with them. 

Do that and the Stalker will be done in no time whatsoever, and the ‘Stalker’ trophy is all yours.