Toxin to bypass shields. Consider replacing [Sacrificial Steel] with [Primed Reach] or [North Wind]. Remember that Demolyst damage doesn't scale off of crits for the base damage (not for procs though) and it therefore might be better to go for [Sacrificial Steel]. However potential Viral procs need to be taken into account and the fact that toxin can completely ignore shields which make up a majority of a Lua Demolyst's EHP. This all should be combined with a frame capable of armor stripping (like [Ash]). Also potentially replacing [Primed Reach] with [Primed Fever Strike] to increase Toxin damage for taking out Lua Demolysts is a potential option.