Helminth options :

• evade > vial rush
• eclipse > vial rush
• roar > vial rush
• gloom > ophidian bite (remove swift bite augment for any mod you like)
• no helminth

Archon shards :

• 1X tauforged yellow shard for casting speed
• 1X tauforged emerald shard for max corrosive stacks / 2x emerald shards for max corrosive stacks
• a mixture of tauforged / non-tauforged crimson shards for either duration or strength

Flex slots :

• umbral fiber
• mecha pulse
• adaptation
• cunning drift
• ophidian bite

/!\ if you don't want to play with the mecha set, I'd highly suggest increasing [Lavos]'s range with either stretch or overextended /!\

-> arcane crepuscular is only used in tandem with evade and can be replaced by arcane bellicose, molt augmented, molt vigor, arcane aegis, arcane hot shot or arcane impetus