Chroma The Final boss
This is the end-game Steelpath Chroma Build that focus on Invincibility. as long as you keep 1/2/3 buff active.
But since the steel path enemies will rip your shield out easily, So the Damage boost will be easy to stack up.
This Build does perfect use in many mission such as General Mission , Steel path , Profit-taker , Even Solo archon but no for eidolon.
(For eidolon need to helminth eclipse instead)

Extra Requirement : 2-3 Azure archon shards with Health regeneration.

Optional : 1-2 Amber archon shards with Energy Orb effectiveness. (*A Safety Protocol to never run out of energy)

If you dont have any umbral forma at all
-use normal forma and swap umbral vitality and umbral fiber with the normal version

For The aura mod you can swap with all the amp aura since you are not force to use steel charge

Recommend to use Unairu School focus for free Stagger immune for 40 seconds by only transference in and out.