[Sarinpa1]

You return the exact damage back you dealt to yourself. Plus fair bit more.
If you have more HP than them, create enough of a damage cap between you and them so they can't bridge it before you pull off the wombocombo, they're dead. Nothing about it. Ende. Schlüss. RIP.

Narcus itself might be the issue, yes. But for starters, screamer should definetly not contribute toward it.