Momentum | D4 Rogue Key Passive

Momentum is a Rogue Key Passive with the following effect (simplified):
Cutthroat skills grant you a stack of Momentum for 8s if they either: "Hit a Stunned, Dazed, or Frozen enemy.", or "Hit any enemy from behind". At 3 Momentum stacks gain: 20% Damage Reduction, 30% Energy Regeneration, 15% Increased Movement Speed.

Once you select Momentum as your Key Passive, you can't select any other Rogue Key Passive. They're considered to be very important parts of your build, so it merits quite a bit of possible discussion.


How best to use Momentum

Basically this segment will be giving you a rundown on the basics on the "WHEN, HOW, and WHY" of the Momentum Key Passive.

Questions we would answer here would be like:
How to use Momentum, as a baseline.
Why you would choose Momentum over other Key Passives.
When would you consider Momentum? As a build-around? An "augmentation"?

Momentum Core Synergies

TBA: When choosing Momentum, are there "absolute godtier" level synergies you essentially NEED to take?

Related Links & Other Information

Still got a lot to do, a lot of data to track, and how best to present it! Post-launch will clarify alot of this for us!

In the meantime, Related Links: