Lavos is just a straight-up tank. Super aggressive, super good, probably the best single frame for Railjack as well.

Not needing energy means you can also use alternative focus schools like Unairu for easy defense stripping & Vazarin for shield gating.

Arcane Aegis over Arcane Guardian for higher level content where even Lavos starts getting 1-tapped.

Mecha mods are also decent on [Lavos]. Here is my Sahasha Mecha Kubrow build to go with these.

• Ophidian Bite: A % enemy health heal good at healing you quickly, and with augment, reducing its own & your other ability cooldowns
• Vial [Rush]: Spreads statuses & is a good mobility tool. With Archon Continuity, if you imbue Toxin damage, you will deal 3 statuses on cast
• Transmutation Probe: Reduces all of your cooldowns per enemy hit. Cycle back & forth between it and your 1st ability to essentially never have cooldowns
• Catalyze: SUPER high damage ability. Damage = 4000 * 2^(# of statuses on enemy) * Power_Strength.... you will be dealing 100's of thousands of damage easily to enemies on every cast. Bonus fun tip: Gas damage is applied before the probe hits an enemy meaning you get a free status damage increase on an enemy.

Why [Archon Continuity]?

It allows you to imbue only Toxin on an ability & get double statuses back (especially useful on your 1 & 2 ability)