Vyr's Mastery | D4 Sorcerer Key Passive

Vyr's Mastery is a Sorcerer Key Passive with the following effect (simplified):
Close enemies take 10% increased damage from your Shock Skills and deal 20% less damage to you. Critical Strikes increase these bonuses by 25% for 3s.

Once you select Vyr's Mastery as your Key Passive, you can't select any other Sorcerer 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 Vyr's Mastery

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

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

Vyr's Mastery Core Synergies

TBA: When choosing Vyr's Mastery, 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:

• If you're here, you're probably looking for some info on the Sorcerer Class.
• Related Skill Tree Nodes: Vyr's Mastery
• Summary of all D4 Build and Character Customization Systems.