For any folks new to playing DD and rolling Assassin, I'm going to give the same words of wisdom I gave on the console version.
Masterful Kill is your best friend and you should use it.
Why? I'll tell you why. It's a counter-attack. But not just a counter, a very hard hitting counter. One that stuffs almost every attack in the game. This includes but is not limited to:
- All straight-up melee swing attacks, regardless of enemy size
- All charging/tackles, regardless of enemy size
- Some throw/grab attacks
- Some magic spells (yes I said magic)
And so on. There's a giant list of the things this move straight up no-sells like a pro wrestler. Far more than the original Easy Kill attack and vastly more than both of the sword counters. You are also safe from attack for the duration of the actual attack animation.
The other wonderful thing about Masterful Kill is that unlike any other counter in the game, it does not, I repeat DOES NOT have a "window". If you use it before an attack hits, as long as you take no other action you could stand there for ten years and when they hit you it will activate.
This skill is amazing, and benefits greatly if you combine it with Instant Reset as you can be safe from pretty much anything enemies can throw at you with good reflexes. When I did solo BBI Assassin runs back on console it was the MVP. It's hilarious to watch guys like Living Armor or Eliminator become completely impotent as they flail at you and only kill themselves faster. Or when you do counter chains on multiple swings.
So yeah, use it if you don't already. It's that good.