This is a basic [Ivara] Mecha set which uses a heavy attack melee to proc slash procs to clear rooms. Basically all mods outside of [Mecha Pulse] and [Mecha Empowered] could easily be replaced as long as you can maintain invisibility. The second Arcane slot is open for anything. I personally use a [Sepfahn] [Nikana] build for heavy attacks and it manages to clear rooms in steel path. This must be used with a Kubrow type pet (Predasites count) and while you can instantly kill an entire room, you do have to rely on the Mecha set to actually proc.