What are weapons that can kill tier 4-5 Kuva Lich very fast to bypass damage negation

I usually use Burston Incarnon corrosive + 2 green shard + nourish and heat, and vulnerability from nova. Or I use saryn, depends. It does damage, oneshots the shield and half the bar but then stops doing any damage. Do I need a bigger instance of damage to basically oneshot?

I'm farming a lot of liches so I'm trying to streamline this as much as possible. I heard felarx is good single target damage? I'm crafting it rn.