General use [Octavia], focused on range + duration.

Mallet + Amp for AoE damage that scales with enemy level. (Avoid using Resonator as enemies will chase it instead of shooting the Mallet.)

Metronome is primarily for staying invisible while your Mallet kills everything, but the other buffs are useful as well.

[Augur Message] can be swapped for [Augur Reach], based on preference.

Strength is beneficial, but it isn't terribly important since Mallet's damage scales with enemies, so Molt Augmented is flexible if you prefer something else.