I didnt like any of the other builds that were posted for this thing, so I threw this one together. 98% crit/100% status chance at met conditions. Use Naramon school to keep stacks up so that luls in fighting arnt so punishing. Went with Corrosive instead of Viral because form what I understand you want to pair viral with Slash, but this thing's slash is so burried under other statuses and its natively high puncture that its never going to proc, and I didnt think that building for it was worth it.

You coooooooooould swap out [Sacrificial Steel] for [Carnis Mandible] for more slash and add Arcane Avenger if you're using this on a frame that can take a hit, but I use this on [Limbo], and taking hits he be not. If you do that then you can change out [Virulent Scourge] for [Primed Fever Strike], though you're basically getting the same damage for one more forma. (15956.4 vs 16338.4)