This build is intended to be a starting point for Octavia, but is capable enough to do Steel Path content.
For it to function properly, fill in the Mandachord instruments leaving no empty notes. (I personally have all instruments set to 0 volume and have a singular line filled in for each of them)

To use:
Use Mallet(1) then Metronome(3) and spam your crouch button until you go invisible.
If you will be moving around, use Resonator(2).
If you will be camping in an ideal room, use Amp(4) and stay out of the line of fire between enemies and Mallet.

Repeat as your ability duration runs out. Run around and pick up energy from dead enemies.

Corrosive Projection - makes enemies squishier, but mainly here for the added mod capacity
Cunning Drift - extra bit of range is nice, but you can skip this mod.

Narrow Minded - +Duration for abilities

Blind Rage - +Strength for Mallet

Transient Fortitude - +Strength for Mallet

Continuity - balances Transient Fortitude.

Intensify - +Strength for Mallet

Stretch - balances Narrow Minded

Constitution - optional, +duration and stagger mitigation

Flow - deeper energy pool to be able to cast all abilities at the same time.

Use Arcanes if you have them, but can fill in with whatever you have:
Molt Augmented - +Ability Strength per enemy kill
Arcane Energize - Energy management cheat. Use Energy Pads or Focus School Zenurik Wellspring as alternatives.