The Basics
1. Put Synth Fiber on your Companion so [Equilibrium] will always work.
2. Use your Divine Spears and Chakram a bunch, since that's the point of this build.
3. Enjoy blazing through content and never dying!

If you wanna know all the details though, feel free to keep reading.

[Reaping Chakram]
First off, that 2x damage multiplier is an exponential increase, applying every time your Chakram hits a target. Second, dropping more health and energy orbs is great for survivability, especially with [Equilibrium] equipped!

[Safeguard] could also be nice if you're more of a team player, at which point it'd probably be worth looking into things like [Health Conversion] and [Stand United]. But honestly, you're better off grabbing a frame like [Wisp] if you wanna buff people like that, IMO.

The Defenses
+550% health from [Umbral Vitality] and 90% damage reduction from [Adaptation] are more than enough for all content, especially when that turns into 99% DR thanks to Warding Halo. Just make sure ya recast your Halo while things are attacking you, for that juicy health bonus.

[Umbral Fiber] is basically never worth it, cause rather than using an Umbral Forma to squeeze it in, you could always use [Health Conversion] instead. In both cases though, it's more protection than you need.

[Equilibrium] and [Primed Flow]
These are mostly a quality of life thing, so you can constantly have lots of energy, and spam all your abilities. If you did wanna [Sacrifice] this aspect, I'd take this guy's advice and go for more range, cause that's probably better for your team-mates.

But you don't need the range when playing solo, and things feel so smooth with this much energy, it's hard to go back to anything else.

Power Strength vs. More Duration
Power strength adds to your Chakram's damage, and your Halo's health, so obviously it's core to this build.

But, I originally used [Primed Continuity] instead of [Blind Rage] on this build, and honestly, if you're doing anything other than the highest level of content it's gonna feel way better using that.

But as I've spent more time on things like lich-hunting, I've realized the extra power strength helps a lot for the damage buff from your Chakram, and I don't use my spears for CC that much (which is the main benefit of the Duration).

You could definitely afford to play around with these though, and find what works for you. This is just what I settled on.

Arcanes
Honestly... I barely have any Arcanes and do fine. An Arcane [Guardian] are optimal for tanking and getting absolutely bonkers Halos, and an Arcane Energize is nice for more free energy, but you could switch 'em out for whatever you want. For instance, I'd rather have Arcane Avenger than Arcane Energize just cause I like to use [Kuva Nukor]!

It's honestly up to you on this one, though. Just use whatever ya find appropriate.