This build was used in steel path

Highlight of this build
1) Instant reloading every gun in the game using Blood Forge
2) Infinity energy
3) Sustain 90% damage multiplication from passive
4) Shield-Health-Energy Integration

Why?
1) Why did I use [Rejuvenation] as aura mod?
Ans : To use [Blood Forge] you need more than 2 hp. For example, with 3 hp and you press 3rd ability, your hp will reduce to 2 but the [Kuva Zarr] will reload all the missing bullet. [Rejuvenation] release you from the stationary hunter with blood altar to the roeming hunter in mission!

2) Why did I use [Quick Thinking]+[Primed Flow]?
Ans : Obviously, you want to maintain passive of blood thirsty [Garuda]. The energy is your health!

3) Why did I use [Natural Talent]?
Ans : [Quick Reload] and quick restore health (energy)

4) [Rolling Guard] and pillage (subsumed ability)?
Ans : In steel path, most of the enemy can one shot you after you take damage just rolling and cast pillage. With pillage and blood letting, you instantly heal your shield and energy while maintain low health for damage!

[Fleeting Expertise], Boreal Hatred and [Primed Continuity] can be replace as you see fit

In my opinion, [Fleeting Expertise] + Boreal Hatred give you 175% efficiency which mean you can restore 140% of energy by forfeiting 50% of health. Mathematically, you can restore 100% of energy by forfeiting around 35% of health (105 hp). Technically, If you wear decay dragon key, the maximum health is 75, you can restore all of energy by forfeiting 26 hp!!

[Primed Continuity] for negating the effect of [Fleeting Expertise] to make use of [Dread] mirror(a little bit survivability)