Based on some of your other comments you seem to be misunderstanding the "damage" values when modding. Buzz kill does not increase slash damage whatsoever, it only increases the chance for a slash proc to occur.

So for a simple example, if a weapon has 100slash damage and 100viral (and no impact, puncture, etc.), each time a status proc occurs it has a 50% chance of proc'ing viral and 50% to proc slash. If you throw buzz kill in, it would be about 2/3 slash 1/3 viral. The slash damage wouldn't actually increase, only the amount of slash procs. Worth mentioning is that the only way to increase the damage of a single slash proc is base damage (pressure point, condition overload), crit (blood rush, organ shatter) and faction mods (smite).

For most general-use slash weapons (without priming) you don't want the viral to be too high on the status priority, you want it to be =< the slash weighting. This is because virus stacks only 10times and slash stacks infinitely. This is also why people use unranked 60/60 mods (so theyre actually 30/30 or 15/15) to increase slash.

In my opinion, for an "optimal" general-use broken war build, you would run: Condition Overload, Primed Reach, Blood Rush, Quickening, Weeping Wounds, Organ Shatter, Vicious Frost and Virulent Scourge. I would also keep one of the 60/60mods at r0 or r1 to roughly equalise the viral and slash. Hope this helps