This is my [Nidus] a real end game killer
The negative efficiency is not a problem on him for his energy refund on virulece aslong as you always hit 4 or more enemies you'll always be able to cast it and parasitic makes this easy.
Larva plus parasitic and virulence will fill your energy and with the enhanced power strength and range youll be killing with ease
This [Nidus] features incredible survivability the carnis set shall clear the status on you and the [Adaptation] lowers incoming damage(doesnt need to be maxed to provide that 90% damage redux)

I kill and face tank steel path foes with this build and you can switch that agur secrets for [Abundant Mutation] for solo endless in steel path