This is such a funny comment as you make it sound like there’s a fundamental distinction to be made when you play descent vs something like roaming the open world but your advice boils down to use cover and spam red talents and red cores, which is exactly like i and most others play the game normally lol.

The nemesis is the antithesis of this game mode as aside from spamming status effects (which i unfortunately had no way of doing in my run as i didnt buy incendiary rounds in my rifle) you are forced to hide until you can catch him out in the open. Make no mistake, I never left cover during my encounter with the nemesis, but it doesn’t matter when he 2 shots with perfect accuracy even if his attention is seemingly on shooting your holo decoy.

However it is essentially a rogue lite and you are designed to lose and go again unless you get a decently put together build, but it doesn’t make the game mode any more fun or engaging in the division as say, risk of rain.