My own little Toxin [Lavos] Optimized for my insane [Cedo Prime] build for 4 Billion Dps Potential, if u want a mecha build Ninjase has an awesome one.

Aura can be [Growing Power], [Shotgun Amp], Corrosive Proj aswell (because we are using Primary Blight on [Cedo] Increased dmg sources arent so bad)

U can put eclipse on 2. ability but u will lose the constant AoE ticking Corrosive & Viral Priming that u can imbue on the 2. ability while farming pathways.
But This will allow you to play Melee influence using 3. imbuent instead on every melee in the game. Leaving it here as an Option.

Helminth can be Eclipse,Roar,Smite,Ophanim Eyes,Gloom,Expedite Suffering. I Chose Eclipse because its a big dps gain for my [Cedo Prime] Build & allows me to switch to 75% DR when I need it.

We are optimizing around my Toxin Cedo Prime so we are doing 3x 45% More Toxin Status Dmg Green shards. 1 Tau Cast speed, 1 Tau Strenght / Duration or Armor shard (Optional Extra Survival Lenght)

Arcane Avenger is really huge here as it puts Primary Fire [Cedo] Into Orange Crits & Secondary [Cedo] Fire into Yellow Crits.
U can also run Arcane Impetus instead of Molt Augmented if u prefer that playstyle it will give a higher strenght ceiling & more CDR on 3. ability if u decide to Subsume 2. ability.

Here is my 650+ Million to 4 Billion Dps Cedo Prime Build

The way I play this is by Toxin Infusing my 2. ability & Fly around leaving trails of Toxin that also apply Corrosive trough [Archon Continuity] or another Element u wanna prime.
U can also mix & match more elements with ur other abilites. Use 1. ability to Heal up & Proc [Archon Intensify] before u pop Eclipse.
Also remember to Transfuse Heat or Toxin on ur 4. ability to get Even more Heat dmg going on ur 4. ability to absolutely melt enemies.

Strenght is Primarly for Eclipse & 4. Ability dmg.
Duration here is HUGE because it affects our abilitys linger time & it affects the Forced Toxin & other elements from [Valence Formation] on our Cedos Status Duration.
This gets Further Scaled with Emerald Green Toxin Shards.

I can also highly recommend my Bo Prime Toxin & Slash stacker Build as ur Melee go to for this Toxin based [Lavos].

A little casual showcase of gameplay